There are a number of tools online and in print that help you think about your gifts and abilities. Here are a few:

Church of the Resurrection’s “Hitting Your S.T.R.I.D.E.”

Discovering God’s Vision for Your Life – an inexpensive booklet with an extensive questionnaire to help discern your gifts

Uniquely You – a slightly more expensive online survey based on the DISC system.

The Myers-Briggs Type Indicator – a useful personality tool that helps identify your skills. A useful book, based on MBTI with a focus on vocation is Do What You Are by Paul Tieger and Barbara Barron-Tieger.

A more work oriented approach can be found in Now, Discover Your Strengths by Marcus Buckingham and Donald Clifton. The book includes access to an online survey to discovery your strengths. (Note: I’ve heard that the “2.0″ version is inferior to the original.)

And, finally, the UMC’s online spiritual gifts tool. It doesn’t work great, but it is free!