One option is to go back to school, not for a career but for fun. Have you always wanted to learn another language, be a history buff, study art history, photography? DH has taken so many photography and history courses at our local community college that he earned enough credits for 2 AA degrees (he had many credits in other areas also). Now he just audits the classes, mostly photography courses. Since it's a 2 year college courses are limited but he has taken some photography courses several times, each time his professors give him more challenging objectives. You may enjoy student class trips to interesting places, nice to have someone else do the driving and parking.