A critical and unfortunately common mistake web designers make is to neglect their own personal portfolio website, leaving up dated content and allowing the design standards to fall a generation (or two) behind. If this is you, keep in mind the fickle nature of freelance work. The freelance gods can will take as swiftly as they give, so no matter how much work you're getting today, finding work tomorrow is the successful freelancer's primary goal.
About.com's web blogger Jennifer Kyrnin has a good article for web designers on the importance of keeping current and keeping standards-compliant, so whip that portfolio into shape and we'll see you online.
Your pals,
The Portfolio Center