The SBA offers many free resources for small business owners and those considering starting up a small business.
If you're considering offering your services for the first time as a VA, you may find some of their offerings helpful.

Including:

Strategies for Success - Guide to Starting a Small Business
This self-paced, online course is easy to use and comprehensive. It can be completed in about 30 minutes. The course is designed to:

• Help you assess your readiness for starting a business;
• Provide an overview of key business principals, such as getting started, business planning, legal aspects, finance and marketing; and,
• Introduce and link you to important small business resources, such as SBA district offices, Small Business Development Centers, SCORE, Women’s Business enters, lenders, and online resources.

The SBA Monthly Web Chat:
Archived transcripts for previous chats include:
"Entrepreneurship: The Essentials for Starting an Online Virtual Business", "Year-End Tax Planning for Small Business Owners", etc.

And an extensive library of forms small business owners and those interested in getting started will find useful.