Many people turn to temporary agencies, permanent employment agencies, or executive recruiters to assist them in their respective job searches. At their best, these resources can be very valuable — it's comforting to know that someone is putting his wealth of experience and contacts to work for you. At their worst, they're more of a friend to the employer or to more experienced recruits than to you personally. For this reason, it's best not to rely on them exclusively. Employment services fall into several categories, each of which is described here.