Kdwolf, try it again. For me, the vibrations come during those doze-off periods when I’m only paying slight attention to what’s going on. Sort of when you’re right on the border of sleep and awake. Be calm when you realize that you’re drifting off, and stay in that in-between state.
Vibrations aren’t necessary, as sometimes I’ll just pop into a dream. They’re more like a big ol’ road sign saying that you’re getting close… Don’t fret over 'em too much.
If you can’t get anything after an hour, just quit and go to bed normally. You can always try again tomorrow. You might also want to try yawning. And, there’s something called the “first night effect”, which is when a subject in a sleep lab has trouble falling asleep with all of those wires hooked to his head. Usually only happens the first night, so that also might be why you had trouble falling asleep.
And you might find it easier to do in the morning. It probably depends a lot on the person.