Sleeping better comes down to a handful of specific habits that align your body’s internal clock with your environment. Most people don’t need medication or expensive gadgets. They need a cooler room, more morning light, fewer stimulants in the afternoon, and a schedule their body can predict. Here’s what actually works, broken down by the changes that make the biggest difference.
Keep Your Bedroom Between 60 and 67°F
Your core body temperature naturally drops as part of the process that initiates sleep. A room that’s too warm fights against this drop, essentially undoing the biological signal that tells your brain it’s time to sleep. The ideal range is 60 to 67°F (15 to 19°C). This lets your body cool down without triggering the opposite problem: when you’re too cold, blood vessels constrict, breathing becomes shallow, and your cardiovascular system works harder to warm you back up. Neither extreme supports the deep, restorative stages of sleep.
Thermoregulation is especially important for staying in slow-wave sleep, the deepest stage where physical recovery happens. If your room creeps above 70°F, you’re more likely to wake during the night or spend more time in lighter sleep stages. A fan, lighter bedding, or simply turning down the thermostat before bed can make a noticeable difference within a night or two.
Get Bright Light in the Morning
Morning light is the single strongest signal for resetting your circadian clock. Exposure to bright light above 1,000 lux, roughly the level you get outdoors even on an overcast day, shifts your sleep timing earlier and improves both how quickly you fall asleep and how well you sleep. Indoor lighting typically falls well below this threshold, often under 500 lux, which is why spending time outside in the morning matters more than sitting near a window.
A systematic review of light and sleep outcomes found that bright morning light was consistently associated with better self-reported sleep quality, while bright evening light made sleep worse. You don’t need hours of exposure. Even 15 to 30 minutes of outdoor light in the first hour or two after waking helps anchor your body’s internal clock, making you naturally sleepier at the right time that evening. If you work indoors or live somewhere with limited winter daylight, a light therapy box rated at 10,000 lux can serve as a substitute.
Set a Consistent Wake-Up Time
Your wake-up time matters more than your bedtime. Waking at the same time every day, including weekends, stabilizes your circadian rhythm so that sleep pressure builds predictably throughout the day. When you sleep in two extra hours on Saturday, you’re essentially giving yourself mild jet lag. Your body expects light and activity at a certain time, and shifting that window even once disrupts the pattern for a day or two afterward.
If you’re getting less sleep than you’d like, resist the urge to compensate by sleeping late. Instead, keep the wake time fixed and move your bedtime earlier in 15-minute increments until you find the window that gives you enough rest. This approach builds a stronger association between your bed and actual sleep, which is especially useful if you tend to lie awake after getting into bed.
Cut Caffeine at Least Six Hours Before Bed
Caffeine has a highly variable half-life between individuals, but the practical takeaway is clear: consuming it within six hours of bedtime measurably disrupts sleep. A study testing caffeine taken zero, three, and six hours before bed found that even the six-hour dose still reduced total sleep time. The effect isn’t always obvious. You might fall asleep fine but spend more time in lighter sleep stages without realizing it, waking up less rested than you should be.
For most people, a hard cutoff at early to mid-afternoon works well. If you’re particularly sensitive, you may need to stop even earlier. Pay attention not just to coffee but also to tea, energy drinks, pre-workout supplements, and chocolate, all of which contain enough caffeine to matter if consumed late in the day.
How Alcohol Disrupts Your Sleep
Alcohol is deceptive because it genuinely does help you fall asleep faster. It reduces the time it takes to drift off and increases deep sleep in the first half of the night. The problem is what happens next. As your body metabolizes the alcohol, your sleep falls apart in the second half of the night, with more awakenings and more time spent in the lightest, least restorative sleep stage.
Alcohol also suppresses REM sleep, the stage tied to memory consolidation and emotional processing. REM latency increases, meaning it takes longer to reach that stage, and total REM time decreases across the night. This is why a night of drinking often leaves you feeling foggy and unrested even if you technically spent eight hours in bed. If you drink, finishing at least three to four hours before bed gives your body time to clear most of the alcohol before sleep begins.
Limit Screens Before Bed
The blue light emitted by phones, tablets, and laptops falls in the 446 to 477 nanometer wavelength range, which is precisely the range that most powerfully suppresses melatonin production. Melatonin is the hormone that signals your brain to prepare for sleep, and even moderate screen use in the hour before bed can delay its release. Research on blue LEDs shows that this suppression follows a dose-response pattern: the brighter the light and the longer the exposure, the greater the effect.
Dimming your screens, using night mode features, or switching to warmer-toned lighting in the evening all help. But the simplest and most effective approach is putting screens away 30 to 60 minutes before you want to sleep. Reading a physical book, stretching, or listening to something calming gives your melatonin levels time to rise naturally.
Nap Smarter, Not Longer
Naps can help or hurt depending on their length and timing. A 10-minute nap improves mood and reduces sleepiness with virtually no grogginess afterward. A 30-minute nap goes further, improving memory encoding on top of the mood benefits, but it comes with a tradeoff: you’ll likely feel sluggish for about 30 minutes after waking. Naps of 60 minutes produce even more sleep inertia with no clear additional benefit over the 30-minute version.
Since most people take 10 to 15 minutes to actually fall asleep, you should plan for about 40 to 45 minutes of total time if you’re aiming for a 30-minute nap. Keep naps before 2 or 3 p.m. to avoid interfering with nighttime sleep pressure. If you’re struggling to fall asleep at night, cutting naps entirely for a few weeks is worth trying to see if your nighttime sleep improves.
Consider Magnesium If You’re Deficient
Magnesium plays a role in the nervous system pathways that promote relaxation, and many adults don’t get enough from their diet alone. A randomized, placebo-controlled trial tested 250 mg of elemental magnesium daily (in the bisglycinate form) in healthy adults who reported poor sleep. This particular form combines magnesium with glycine, an amino acid that also has calming properties, providing about 1,523 mg of glycine per day alongside the magnesium.
Magnesium won’t override poor sleep habits, but if your diet is low in magnesium-rich foods like leafy greens, nuts, seeds, and whole grains, supplementation may help fill a gap that’s quietly making sleep harder. Taking it in the evening is common practice, though the timing matters less than consistent daily intake.
Try a Weighted Blanket
Weighted blankets apply gentle, distributed pressure across your body, similar to the sensation of being held. The general guideline is to choose one that weighs about 10% of your body weight, though preferences range from 5% to 12%. A 150-pound person would start with a 15-pound blanket. The pressure can reduce restlessness and help some people feel calmer at bedtime, particularly those who tend to feel anxious or physically unsettled when trying to fall asleep. They’re not a cure for chronic insomnia, but they’re low-risk and worth experimenting with if you find yourself tossing frequently.