My best generic advice is to try to put yourself in the mind of your perfect client/customer.
It can be easy to forget this, but they're just as desperate to find help as you might be trying to find work. Think about where they might go—online or offline—to find help, and go there. Rinse and repeat. You may not even meet your actual client this way, but may meet someone who knows someone. That's just about nearly as good.
Once you have a few stable clients, that's where a good network comes into play. Do good work, be nice, and tell people what you do, and the work will keep coming in (and likely in amounts greater than you can handle).