Give it away now
Share your knowledge FOR FREE with all of your clients and anyone else that wants to listen to you. Look, you probably have a number of great ideas and advice that would really help your clients out - write them down and pass them along to people as much as possible. Show your clients that you are dedicated to helping them and that you are an expert in your field.
Stand behind your work
Have you ever heard, "I'll just stay with the design or designer we currently have" from a prospect? Chances are that if you've been in business long, you have. Even if doing business with you is clearly the better option, sometimes people will just stick with what they have. Why? You'll find it boils down to risk; people don't like risk, so they try to minimize it when possible. Help people minimize risk by standing behind your work and offer a guarantee.
Encourage your clients to spread the word
If your business thrives on referrals, develop a program that rewards people for stepping out of their way to send business to you. Develop an easy to follow, understandable and convenient referral program for your customers - and make sure they know about it. Take a proactive, rather than reactive approach in obtaining more referrals.
Make the commitment
You've been hearing this one ever since you were little, "Save your pennies for a rainy day.” Smart freelancers know that marketing and design are necessities; they devote a certain percentage of every sale to growing their company. You can do this too, just take 10% of your revenue and dedicate it to marketing efforts, improving your brand image and growing your business. You've heard the term, "If you're not growing, you're dying", make sure you do this for yourself and your company - you're both worth it.