Sometimes you have some free time but you can't decide what you want to devote it to. I always want to spend my spare time in a useful way and I prefer to things that are important at present.
Nowadays more and more people are interested in sport, hiking and extreme kinds of spending one's time. I have noticed that a lot of people buy bikes and spend a lot of time riding along the streets of the city. Some prefer hiking.
Now when it is summer you should take the most of this time and spend more in the fresh air. In stead of sitting at home or visiting cafes and bars devote this time to sport.