This article is from the Lucid Dreaming FAQ, by "Lars Rune Foleide" firstname.lastname@example.org .
This technique works by punishing yourself every time you fail to
realize that you were dreaming. While going to sleep, tell yourself
that you MUST become Lucid this night OR you will be punished in the
morning. Various types of punishment may be a cold shower or maybe an
electric shock. A 9 volt battery against your tongue maybe. This
technique should be used in combination with MILD. The point is to
increase your intention, and it works.