Retirement doesn't have to include endless games of shuffleboard and bridge. In fact, for many of today's retirees, this couldn't be further from the truth.

"The retirement of our parents' generation — we'll look back on it as a blip of the screen," said Nancy Collamer, author of "Second-Act Careers: 50+ Ways to Profit from Your Passions During Semi-Retirement" and founder of MyLifestyleCareer.com.