Yeah after the "pop" the vibrations stop everything is calm and I'm floating around, although sometimes at this point I'll experience bi-location and feel my physical body laying in bed and my "etheric"/"astral" double floating around at the same time. 

Once you have a total OBE, there will be no question whether or not it's your imagination. It pretty much proved to me that consciousness in not dependent on the "physical" body, and will survive death. It's that powerful. 

With practice and willpower, you will kind of develop your own variation of the techniques you read about. Remember to save your emotional and sexual energy during your waking hours, it's needed for this kind of spiritual work. Keep it up, and you will succeed.