Do I have to do all of them?

@stephanie19: if you do you're pretty legit for a good nights sleep guaranteed .. sleep is a big deal for your overall health .. mental,physical ..emotional...

and make sure you don't drink too much caffeine over the day ..try some relaxing teas like sleepy time or chamomile .. and practice meditation daily if you can .. an hour everyday at least .. it's going to relax your mind and body more and more over time so you can handle stressful situations better and it's going to be easier to fall asleep.