The Small Business Administration has a fairly large catalog of free online business courses that you can take at your convenience.
Each course lasts about 30 minutes, and can be run at your own pace. Simple select the course you want to take, complete a short registration form, then watch the presentation.
Each topic contains multiple seminars, and Topics include:
Have a free half hour—go to the SBA and learn something new that will help you manage, market and grow your small business.