[DuePew]

I hate to tell you that the hypnagogic state is the beginning of deep trance- that you need to stay aware longer to get deep enough to get to the exit point. So you don't need to 'follow' the visions- if you synch properly they'll slow down for you.
As to vibrations, they are also the beginning of the exit process. Sometimes exit happens either after they (too) have slowed down for you-sometimes exit is possible after vibes have stopped altogether. This is a little known fact (or factoid, since in projecting nothing works 100% the same for everybody) that frustrates potential projectors who think they have lost the 'window of opportunity' for projecting when the vibes stop.
Two more things to note: Not everyone experiences vibrations, as some people have smoother transitions from the physical to the nonphysical states, so your goal shouldn't be to slow down the vibes or control them, but to use them as a synchonization tool to exit. Sort of like a surfer waiting for the right wave to jump in.
Another note: The vibes you get when practicing NEW are not the same ones you get upon exit- NEW vibes are more your awareness 'tuning in' to your energetic sensations, and to your body's natural rythmns.
One thing you can do to help you reach deep trance without clicking out is to try to combine looking at your hypnagogics and listening to your earhiss, and you might find yourself having exit sensations while completely aware.