Whether you retire from your official job in your 50s or 70s, you could still have a lot of life to live. And if you've toyed with the idea of working a new job in retirement, you're not alone.

Of surveyed retirees who've taken on jobs, 89% say working allows them to remain active and involved. Nearly as many, 88%, say they like having a job. A full 83% find their work rewarding. The $23,760 ...