Most use a combination of testing and individual counseling. Many will help with resumes. To find a career-counseling service near you, click on one of the geographic categories listed below. The former breaks the area down by work category, profiles some of the largest employers in each field, and provides useful numbers and addresses. The latter profiles employers nationwide.
Public libraries are also a good source of job information.
Nearly all have special sections devoted to resume writing, career development, starting your own business, and more.