Your career is too important to spend your time looking for a job on a variety of sites. If you were sick you would find the best possible doctor. You should do the same thing with your job site. There is no better job board in the world for legal professionals: LawCrossing shows you jobs from every single employer career page, job website, association website
Mass mailings don't work. They are expensive and ineffective. Direct mail yields a 1 to 2 percent response, tops. And most of the response will be thanks but no thanks postcards from busy personnel departments.