One of my favorite books by L. Ron Hubbard is Self Analysis.
This is a really remarkable book because it gives anyone who reads it tools to improve his/her own life.
The processes in the book can also be applied to someone else. All you have to do is read the first few chapters where Mr. Hubbard describes the procedures and how to use them, and then grab a friend, a wife, husband, friends, child, neighbor... and dig right in.
I ran Self Analysis on my sister, who is not a Scientologist, and she had this realization. She had thought that her life in college was pretty awful, but after the session she realized she could remember vividly things about college that were really good - good friendships and good times. It gave her a whole new viewpoint and she felt much lighter and optimistic.
And it only took 1/2 and hour!
Scientology technology is so simple and so remarkable!