Parents know sleep is crucial in a child's development, which is why they research tirelessly about sleep training, schedules and even body positions to ensure their baby can sleep well.

An underrated fact is that many tips about optimal baby sleep apply to adults as well. For example, a proper sleep routine is vital for toddlers since it helps their body clocks learn the right time to wake up, play and sleep. The benefits of a consistent sleep schedule also apply to adults.

Like kids, grown-ups benefit from a bedtime routine when going to sleep. So how can you tell if you're not reaching your sleep goal?

One of Asia's leading sleep scientists, Dr Michael Chee of Duke-NUS Medical School in Singapore, shares the signs of not getting enough sleep:

• Frequently feeling sleepy the next day
• Falling asleep when left alone in a quiet room
• Sleeping more than two hours extra on days when you don't have to wake up early

The key, Dr Chee says, is to "ring-fence" your bedtime routine. Set aside time to wind down, understand the activities that will relax you and stick with the same schedule consistently until it becomes a habit. 

If you're looking to get some quality sleep, here are a few tips for building a bedtime routine – the kind that gets you just one more hour of deep sleep.

Your goal is to get seven to eight hours of sleep. You turn on the alarm clock for wake-up time in the morning, right? Do the same for bedtime and stick to the same schedule every day.

The most helpful tool will be your phone's clock or health app. On an iPhone, for example, turning on the bedtime setting will dim the lock screen, and incoming calls and alerts will be silenced. You won't see the notifications on the screen until you unlock your phone.

Try to reduce screen time before going to bed. (Credit: Getty Images)

Your phone's "do not disturb" mode serves as your cue to give your eyes a rest from digital screens – including social media. Experts recommend stopping screen time two to three hours before bed because the blue light from digital screens can wake you up. 

If watching a movie or reading a novel on your tablet helps relax you, then put your phone or tablet in night mode.

Tea may help you sleep with the added health bonus from its antioxidant component. (Credit: Getty Images)

There are no definitive studies that say tea (or warm milk) will treat insomnia or improve sleep. But anecdotal evidence suggests it works.

Chamomile tea, which is said to have a calming effect, is a popular choice. But celebrity chef from the School of Wok, Jeremy Pang, prefers another herbal tea. "I really like fresh chrysanthemum tea to sleep like a baby."

Stretching does wonders to melt the day's stress and loosen the tight muscles on your back. Get the most comfortable experience by stretching in bed – the softness of the mattress will cushion your moves as you twist, reach and bend. 

There's a reason many beauty, bath and wellness products include lavender as an ingredient. Respected research has shown lavender essential oil can improve sleep quality. Many doctors recommend it to patients looking for natural sleep aids.

The most popular way to use lavender oil is via a diffuser – add a few drops to water and enjoy the scented vapor. While it can be applied topically, doctors warn that essential oils can irritate the skin. So, if you plan to use it as body oil, make sure it comes from a reputable source (like a brand with an ISO certification). This will ensure the right concentration and dilution of oil in the product.

These tips about how to sleep well are like first aid. However, they will work better if you know what keeps you up at night.

Dr Chee says an overactive mental state is one of the primary reasons people find it difficult to sleep. The Professor at Duke-NUS Medical School and Principal Investigator of the Cognitive Neuroscience Lab elaborates that specific sleep inhibitors can be "worrying about a family member, thinking of how to compose an email or pondering a challenging issue."

What do you worry about that keeps you up at night and prevents you from sleeping soundly? You can make a deliberate effort to disengage yourself from these concerns before bedtime and focus instead on a wind-down activity that relaxes you.

Read #OneMoreHour sleep tips from AIA, to help you live a healthier, longer, better life.

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