If you have a family, make sure they understand the emotional and financial sacrifices business success requires. When your family doesn't support your business-if they're always saying, "Can't you leave that alone and come to dinner?"-it's going to be tough to make your business work. Unless your family is ready for you to become an entrepreneur, chances are this isn't the right time to do it.

Excerpted from Start Your Own Business: The Only Start-Up Guide You'll Ever Need