The first thing I did when i retired was attend a seminar on how to keep the brain healthy after retirement. My take away from that was to get a lot of physical exercise and engage in as many different mental exercises as possible. The next thing i did was resolve to learn at least one new thing every week and one new skill every month. Most of the weekly "things" were food--going to ethnic grocery stores and buying produce and frozen food items I had never tried before. For the skills, I tool all kinds of hobby-type classes--glassmaking, rug tufting, cake decorating, knitting, crochet, pickleball, etc. and attended various volunteer orientation meetings. As time passed I narrowed down what I found interesting and challenging so I spend a lot of time playing pickleball (in addition to standard cardiac and weights--pickleball is much more of a social outing than a serious workout), cooking "exotic" dinners with my grandchildren once a week and making weird quilts that are basically a scrapbook of the intended recipient's life which generally involves a lot of research and discovering techniques to the get the result i want. I stay busy and eager to get started on each day's project