I know a lot of people, including myself, who had good experiences with temp agencies. I got my current job by being a temp first actually. It's a nice way for both sides to "try out" for awhile, and if there is a fit companies usually are very favorable to hiring at the end of the term, but it depends on the company.

Also, it's also important to keep a good relationship with the temp agency while they search for you, and during your assignment. Talk with them often, call and ask what they have available weekly, and let them know exactly what you are looking for. Being on good terms with them will most likely land you a better assignment.

Remember, it's okay to turn down an assignment if you don't think it will be a fit. Don't just take it because it's offered and you don't want to make them mad. They want you to fit in so you'll stay there awhile.