Sword Jester, I have had the same problem and developed my own method of enlightenment. Ironicly though, it's about as far from a spell as possible. Here it is:
Whenever you want something, or want to do something, psychoanalyze it. Just think about every possible reason why you might want this thing. For this, you're going to have to be as scientific as possible, because your most basic desires are usually driven by simple things such as survival and the survival of an offspring. Evolution at work.
Now if you still haven't found what you're looking for, it must be something spiritual. Do the same thing with psycoanalyzing it. You will find your answer eventually. This method worked for me, and brought me much knowledge about me and life itself. Probably too much.
Hope this helps.