Starting a business continues to be an attractive option for those who have left careers but aren't quite ready for a life of golf and snoozing on the couch. Unlike younger entrepreneurs, boomers and seniors have a wealth of business and life experience that can be applied to a new business venture; often that experience greatly reduces the risk of failure.

Still, before you start a business, you need practical guidance as to what kind of business you should start. The fact is, not every business idea is viable. Even if you have the experience, wisdom, and passion, you must choose a line of business that has the potential to attract customers.

Small business expert Susan Ward has created a handy list of "The 10 Best Business Opportunities 2015." While there is a certain amount of subjectivity to such lists, this one includes areas that are forward-thinking and could have real potential. See if any of them spark your interest. Read Susan's article here.

"The Hottest Jobs and How to Get One in Retirement" by Nancy Collamer is another helpful article. Collamer evaluates several areas projected to achieve high growth in the next five years, suggesting that they could present untapped opportunities for work or self-employment in retirement. Read Nancy's article here.