I love freelancing. It's a great way to meet new clients, a lot of times freelance weok turns into long term work. It's also a good way to fill in the gaps so to speak when your business hits a slow time.
Depending on what services you offer there are freelance job bidding sites like getafreelancer, elance, rent-a-coder, scriptlance etc.... These can bring a lot of work if you're willing to bid competitively.
For someone like me that offers transcription and virtual assistant services, bidding on those sites is really rough! Mostly because they are international. Companies overseas offer the same services I do for about 1/10th the price.