To help cure your insomnia, make your bedroom or sleeping area as inviting and calm as possible. Your environment should also be relatively quiet, although many people can get accustomed to some background noise. Focus on the comfort of your sleeping area and save your bed for only sleep, sex, and light reading as it can lead to higher quality and duration of sleep. Avoid eating, studying, watching TV, texting on your phone or paying bills in bed.  If you live in a noisy neighborhood, consider wearing earplugs or buying a white noise machine. White noise (like the sound of static) drowns out other more distracting noises. Make your bed with comfortable sheets that don't make you too hot or cold at night. In general, try to keep your room cool — around 60 to 65 °F (16 to 18 °C) (though this may be too cold or impractical for some).  Wait until you're comfortably drowsy to go to bed and don't try too hard to fall asleep. If you can't sleep, get out of bed after 20 minutes and do something relaxing. For your body to think that it's time to fall asleep, your sleeping environment has to be relatively dark, although many people can get accustomed to some amount of light. Darkness triggers the release of hormones, such as melatonin, in your brain that initiate the "sleep cascade" and promote deep sleep. As such, close all your blinds and turn off all sources of illumination that your can see from your bed. Don't browse the internet on your phone while in bed, as the bright screen can make you more alert and less drowsy.  Use thick black-out shades to prevent light from coming in through your windows, or wear a sleep mask over your eyes. Avoid bright (and noisy) alarm clocks and remove them from view. Once you set your alarm, hide your clock so the light and time don't distract you. Watching the time can increase anxiety and make insomnia worse. It's important to develop relaxing rituals in the latter part of the evening to prepare your mind and body for sleep. Work, school, exercise, paying the bills and preparing...

TL;DR in Indonesian:
Siapkan kamar tidur yang nyaman. Tidurlah di kamar yang gelap. Lakukan ritual sebelum tidur untuk merilekskan diri. Jangan pergi tidur dalam kondisi lapar.