1. Save up as much money as possible before starting. All too often, people go into business without any savings, exclusively using loan money from friends, banks, or the SBA. They except to be able to start paying the loans back right away with their profits. What these business owners don't realize is that it can take months or years to make a profit. And once a lender discovers a business isn't as profitable as expected, the lender is likely to call in the loan or refuse to renew it for another year. Often new business owners then have to take out home equity loans or use credit cards to pay off their loans (which puts their home and credit rating at risk).

A better plan is to save up as much of the needed investment money as possible, including your living expenses for the first year, or even two. Odds are that your business won't be profitable for one to two years. Even if you get plenty of business coming your way -- and your customers pay you on time, which isn't always a sure thing -- you'll want to be able to invest most of that money back in the business for space, equipment, advertising, and insurance needs.

2. Start on a shoestring. Think small. Don't rent premises if you can work somewhere else, and don't hire employees until you can keep them busy. (You can hire independent contractors or temps in the meantime.)

People who start their small business on the cheap, often in a garage, den, or some other scavenged space, and create their first goods or services with more sweat than cash, have the luxury of making their inevitable rookie mistakes on a small scale. And precisely because their early screw-ups don't bury them in debt, they are usually able to learn and recover from them.

3. Protect your personal assets. When you go into business for yourself, you are usually personally liable for all judgments and debts that the business incurs. This includes business loans, taxes, money owed to suppliers and landlords, and any judgments against the business as a result of a lawsuit. If you don't protect yourself, a creditor can go after your personal assets, such as your car and your house, to pay for these debts.

While you can protect yourself against lawsuits by buying business liability insurance, this won't help you with business debts. If you will be running up big debts, consider forming a corporation or limited liability company (LLC). Just one person can form either of these types of businesses.