A lot of good advice above, I'd print it out and keep it in my job search folder if I were you--

Here are a couple more things to think about:

Remember that there is a difference between a job and a career--you are stuck with a job you don't like because you haven't planned for a career--Why go after another job you'll end up not liking? Start thinking about what career you want, what you will need to pursue it. Put everything on the table, including more education, training for special skills, relocating, the whole nine yards--

Keep your eyes and ears open for opportunities, and think about ways that you, with your interests, abilities, and skills, might fit in, and, as I said above, be open to the idea of moving, special training, etc--

Think very carefully about what happened in all the work situations you were in--not just the skills you used, but the working relationships that you had--this will help you more than anything else in figuring out what to look for and what to avoid in the future--

Also, remember, there are always people around who will help a person who has a positive attitude and knows what they're after, even when the resume is a little thin--and remember to keep in touch with folks who have shown a positive interest in you, even when they haven't given you a job--time passes quickly, and you never know what possibilities the future will offer--