Take Advantage of Newsletters
Searching for freelance jobs can pretty much be a full-time career and in and of itself. Instead of navigating the deep, dark well of large job sites alone, be strategic and find newsletters and websites that cater specifically to editorial careers. I'm personally a fan of the Brian Scott Morning Coffee Newsletter from FreelanceWriting.com, Ed2010.com and its accompanying Twitter feed, and the All Indie Writers job board, which breaks down listings in clear terms. If you are more comfortable using more general job board sites, try setting keyword searches for "writing" or "freelance writing" jobs, which will then be emailed to you on whichever schedule you choose.