Adapted from the upcoming book THE WALL STREET JOURNAL COMPLETE SMALL BUSINESS GUIDEBOOK by Colleen DeBaise (Three Rivers Press, Dec. 29, 2009). Starting a business is a lot like becoming a parent. Not only do you have to prepare for your start-up emotionally and financially, but you have to be committed to its constant needs until it’s mature enough to hum along on its own. And even then (much ..