If you are looking for a relaxing activity that can be done in short period of time, then you can play computer games. You can browse in the internet to find the computer games for your need.
If you own an Apple Mac, you can go to MacGames.org to find the games for your Mac. In this site, you will find a wide range of Mac games in different categories. You can download free Mac games or you can also buy Mac games to get the full version of the games. Just go to this site to get the Mac games you like.