Here's some advice that I took from HN a while back and have benefited greatly from:
Market yourself as an expert in your field and not someone that just 'wants to learn,' even if that is your primary goal. Businesses (and any potential clients) are in it for a profit, and they generally want people who appear to know what they are doing rather than someone who is looking to learn. Now, keep in mind that you will most likely be learning a lot through challenges that arise - this is actually the fun part (in addition to the paycheck)!
By now, you probably know a few people in the business. Email, call, or perform any other forms of reaching out to these people. Google "X freelance jobs in X city." Update your LinkedIn. Go to local Meetups (meetup.com is great) and hand out business cards (these can actually be ordered cheaply via internet sales). This may all seem like obvious information to you, but go ahead and add it to what you are already doing.
Also, the most effective resume is a portfolio.
Good luck in your future endeavors!