Self-assessment is a process by which you learn more about yourself -- what you like, what you don't like, and how you tend to react to certain situations. Knowing these things can help you determine what occupations might fit you better than others and what kind of work situation might work better for you. Check out the links below for some assessment tools and resources.
The Riley Guide - http://www.rileyguide.com/assess.html
Keirsey Temperament Sorter - http://www.advisorteam.com/temperament_sorter/register.asp?partid=1
Self-Directed Search - http://www.self-directed-search.com
Skills - O*Net - http://www.onetcenter.org/guides.html
Testing Room.com - http://www.testingroom.com/
Obik Pathfinder - http://www.obik.com/welcome/usnews/path.htm
All-the-tests - http://www.allthetests.com/career.php3
Personality Types & Careers - http://www.doi.gov/octc/typescar.html
Career Key - A free public service on the web to help people make sound career decisions. The Career Key helps you identify your career interest codes and related occupations similar to Holland's Self-Directed Search.
Princeton Review Career Quiz - Think of how happy you'd be to go to work each day saying to yourself, "I want to," not "I have to." The difference? It's simply matching the right person with the right place. For most people achieving that perfect fit isn't that simple. This summary quiz is designed only to give you a taste of the full tool, which constructs a much deeper and more accurate individual profile.
Career Zone - Work environments can be divided into the six broad interest areas on the right. These can be combined in many different ways. Knowing your unique combination of interests can assist you in determining jobs that suit you best.
The VARK - This questionnaire aims to find out something about your preferences for the way you work with information. You will have a preferred learning style and one part of that learning style is your preference for the intake and output of ideas and information.
HUMANMETRICS: Jung Typology Test http://www.humanmetrics.com/cgi-win/JTypes2.asp
Type Profiles - In-depth descriptions of the 16 types identified by the Myers-Briggs Type Indicator or the Keirsey Temperament Sorter.
Personality Type Summary - Brief descriptions of the four dimensions and 16 types identified by the Myers-Briggs Type Indicator or the Keirsey Temperament Sorter.
Transferable Skill Survey - Assess 62 skills in five categories: Communication; Research & Planning; Human Relations; Organization, Management & Leadership; and Work Survival.