OBEs and Astral Projection

To be able to Astrally Project, you need to be able to keep your mind focused AWAY from your body. To do that you should(but don't have to be) in a realitively relaxed state. Alpha state is sufficient for Projecting. Also, you're going to want to have a 'goal' in mind for each Projection you do. It's very hard to go into something like this and just 'wing' it. So have a 'mission' in mind like. . . you wanna visit someone in particular. . . or you wanna go to a part of the country you've never been to. . . or you want to search out a teacher on the Astral who can help you. . . or you just want to meet your spirit guides. Anything will do.

So, find yourself a quiet place for your attempt. If you're trying at night, make sure you're not TOO tired because you risk just falling off to sleep. I've heard the best time is when you wake up in the morning, you're not too tired, or too 'awake'.

So meditate for a bit to get relaxed. When you feel you're sufficiently relaxed, take a DEEEEEP breath to the count of about 10. Then exhale for the count of about 20 and while exhaling visualize your spirit dropping, make yourself feel like your falling off a cliff, or like the bed or floor below you has disappeared.

When you feel that 'dropping' effect, you might also feel another common sensation known as vibrations. It isn't your physical body vibrating, it just feels that way. Some believe(and myself) that it's your spirit 'loosening' itself from the confines of the physical body. Now it's at this point you want to focus on that 'goal/mission'. This will be when you'll seperate and you'll find yourself wherever it is that you want to be.

Now, to return to your body. . . you only have to return your focus towards your physical body. When you do that, you'll find you'll be back in your body. And right back where you started. Congrats!

Now this skill, like anything else, needs TIME and PATIENCE to master it. It can take from a few months to several years. So PATIENCE and keep practicing.
Goodluck!