Date or Soul Mate? by Neil Clark Warren (2002, Paperback)

This book helped me to identify myself, my character, more before entering a relationship. The author, Dr. Clark, says this is a huge mistake by many people - not knowing themselves well enough before entering a serious relationship. Once you know yourself, the book then explains to identify some potential "must haves" and "can't stands" in a relationship. These are a mental checklist for your first encounters with someone, to ensure you don't get caught up in something incompatible.
I haven't finished the book, yet. So far, I would recommend it. eHarmony on the other hand, isn't so good. I've averaged one match per week on the site, and nobody takes it seriously. Then again, I'm only 23, so maybe I shouldn't be so critical.