First of all there are many forms of meditation and many reasons to do it. Pick the one that suits you best.
For me it became zazen.
Trying by myself didn’t work for me at first. Through internet I found a group in my area. I joined them around the time you started your meditation. It was really helpful. For instance they check the way I sit and help me correct it. Also sitting in a group increases the intensity of my practice. Now meditation has become a habbit as I sit for about 15-20 minutes every night. I’m no longer part of the group, because I moved. Currently I'm thinking of joining a group again here. I’m still in touch with my old group. They are planning a retreat, which I’d love to join.
A basic technique that has kept me busy since I started zazen is to count my breath. I count every time I breathe out all the way up to ten and then start over. When I notice my focus is no longer on my breath I start over. When you try this remember that it is not about getting to ten every time, it’s about keeping your attention on your breathing.
Don’t worry about reaching any kind of state. Meditation as I’ve learned it is not about states you can get in and out of. Let go of any preconceptions or expectations. Just sit. Just breathe.
There is nothing wrong with using these techniques to relax and/or to fall asleep. Just don’t fall asleep when you are meditating. Maybe it’s an idea to meditate in the morning…
sitting techniques