All good signs of a healthy mind! I am in the same position except I have a teenage daughter to raise. I would read nooks, listen to music, watch movies, research something interesting, and so forth, all of which you can do on the Internet. Also exersize is a good thing. Maybe research a hobby, one that you can join a local group interested in the same thing and make new friends. Bicycling, hiking, playing board games, whatever.

Just some ideas.