Here's a URL with suggestability tests. You can use them as a rough guide of your progress in direct learning self-hypnosis. I've done enough non-textual learning with the subject to have it be almost funny. "One.. my eyelids are becoming very heavy"
*SLAM*.
I once was hypnotized by Bandler while reading a book. He was talking about polarity responders in Trance-Formation, and when I got to the part that said "DON'T close your eyes," *SLAM*.
Self-hypnosis is weird because you expect to feel weird and/or have immediate results. The truth of the matter is, you won't feel too much different unless you make a direct suggestion (e.g. the "Deep Relaxation" paraliminal), and you won't see a direct result, although you can completely change, add, or leave behind a behavior in about three weeks.
For the record, paraliminal tapes are non-hypnotic*. In fact, they are antihypnotic in nature. However, the movement from an external to an internal state of awareness, plus the experience of hearing at an other-than-conscious level, will aid one in self-hypnosis.
*(Rapid Reading Made E-Z, page 155).