What methods have worked best for you to Astral Project (OBE)?

One excellent way is through relaxation and meditation. Once you get yourself into a completely relaxed state or alterered state of consciousness, try to clear your head of everything and repeat the line 'I fly, I fly' over and over. If you can manage 5 minutes without drifting off to 'what shall I do tomorrow' or similar things, then you have exceptionally good mind power! Again though, if you do drift off onto other things, just snap yourself back without thinking about what happened. Sooner or later though, you will leave your body.