Plan your free time

Everyone knows about planning your work, but what about free time? I've recently realized that it is just as important to plan your free time. Usually, when I take a day off with no plan, I end up doing short-attention span activities like surfing the web, playing video games, etc. Not that it's bad to do that once in a while, but I don't think it's very rewarding in the long run. I've decided to schedule time to plan my free time and do longer-term activities like reading a book, learning a new subject, going on a hike, exploring town, etc.