DL is more effective if you use New Option Generator or visualizing your time line.

It's best results come when you are in a situation and you find yourself doing something you suddenly realize you had not studied. Answering questions in class, playing a sport better. For me, i suddenly started doing relaxation exercises. It took me awhile before i realized that i was doing stuff i had not studied. I went back to the library and checked out the books i had PhR on stress reduction. I did find the exercises there.

DL---is subtle if you are not in situations that bring it out....like a classroom or a work situation.