Going back to school, even if it's an extension course offered by a local community college, is another popular way seniors are enriching their retirement years. Programs offered by museums and local outreach organizations provide entertaining instruction in everything from bird-watching to bookbinding.
For more sedentary seniors, book reading is big, too. In 1999, a Book Industry Study Group analysis found that readers 55 and over accounted for more than a third of the book buying market. In retirement, dedicated readers of fiction, non-fiction and biographies are likely to continue or increase their reading activities, and even occasional readers are more likely to explore reading options like magazines and e-books.