Here are a few tips on making a safe career transition:
Surround yourself with positive, similar-thinking people.
Conduct as much research as possible on any new field. Besides the Internet and the public library, talk with others in the field to understand it better.
Check with the U.S. Small Business Administration or local chamber of commerce to learn of business opportunities.
Keep expenses as low as possible. Live within your means.
Save enough money to live for a few months without income.