I have one semester to go before I get my BA in Psychology. I was planning on getting my Doctorate in Clinical Psych but decided against it. The time and effort necessary to obtain one isn't worth it to me for the pay one is likely to receive.
APA Research Office: Salaries in Psychology: 2001
This was in 2001, so salaries have likely increased since then. But your best bets for good money are Educational Administration or Applied Psychology (Industrial/Organizational) positions, which have an average pay of around $100,000.