Something perhaps as important as motivation is change. Be prepared to always change. Don't be afraid to make changes. Do research into your competition as much as you can and note changes that they are making. Look for ways to do things more efficiently. If you've resisted using your computer to help your business along, go ahead and take that Windows class that you've seen offered. Buy that accounting program that a friend told you about. The bottom line is that if you feel you could do more to increase your business then it's up to you to figure out what is needed.
Monster.com
Monsters tips on staying motivated while working at home. Best advice
I've seen so far.
Motivation123
A site full of ideas for staying motivated. The newsletter and idea kit
are free but you do need to sign up for both of these with an e-mail
address. Check out articles and the links.
Inkpot.com
The Flying Inkpots Zine Scene - Online journals, periodicals,
magazines and zines. Many categories.
Motivation/Self Motivation
Motivation approaches and strategies with assignments and questions to
ask yourself. This site has a CD of motivational songs and symbols to
purchase of which a portion of sales is donated to the Dream Foundation.
Weekly Web Motivator
Australias weekly web motivator you can subscribe to. Motivational
tools and a quote service.
Motivateus.com
Many quotes, inspirational and motivational, and success stories.