One way to get clients is to get out there and get to know people. Build a relationship with them so they know that you are indeed a person and not just another faceless business. As an introvert myself, I definitely have a hard time with this one.
If you’re an introvert, click here: Networking for Introverts
If you are an extrovert, click here: Networking for Extroverts
For general advice for everyone, click here: Beginner’s Guide to Networking