Caroline Middlebrook's Want to Quit the Day Job But Can't Afford to Maybe You Can
demystifies what should be about surmounting the hurdles of getting rid of pointless career for a more satisfying business.

Yvonne Russell's Do You Have a Business Will offers great tips on how to prepare for the worst.

Chris Garrett's Freelance Blogging: How Much Should You Charge will give you some ideas about professional bloggers' rates in case you'd like to try that career.