When you organize yourself in this fashion, you will find that you are actually getting somewhere. For the most part, open listings, whether print or electronic, are incredibly competitive simply because they are open to so many people. They are also very impersonal. You are either reduced to an electronic response or a piece of paper, either one of which has to create enough enthusiasm so that you will be selected over potentially hundreds of other applicants. Listings in general, however, are the least effective way to spend your time.
Referrals are the most productive.
Personalize your search whenever possible. Headhunters and search firms get paid when you are placed. If not, it is unlikely that a search firm will want to spend any time finding a position for you. You will be much better off conducting your own search.