Just the basics here. Nothing complicated. Also consider these ideas:
1) set and stick to a regular time. 10pm. 10:45pm. Whatever it is, make it consistent.
2) don't drink a lot of water after 8pm so you don't have to wake up to pee at 2am.
3) journal before you hit the hay. Get down any frustrating or stressful thoughts so they don't stay in your brain and have you tossing and turning all night.
4) make a list of the top 3 things you're grateful for before sleeping. Friends. Your wardrobe. Good food that you made that day. Fall to sleep counting your blessings.
Cheers to better sleep!