if you work as freelance web designer , responsibilities get increased as you become single point for developing and bringing business, there are certain things you should keep doing for improvement and should include it in your daily schedule. Below is quick points.

Keep yourself updated about technology and new things in industry.
Research and use tools which reduce your work and do the job for you.
Get yourself aware about different project management tools and client reporting tools.
be active on web design communities and establish your name as an web design expert.
Spend regular time for inspiration and research.
Try to find resource for continuous word to keep the flow of money continuous.