There's a lot you can do for your body health by learning some self massage techniques.
At the end of a long, hard day, one of the easiest, relaxing techniques you can do is roll a ball under your foot for a few minutes.
You don't need a special nodule ball, a tennis ball works well. A golf ball looks the right size but can be quite painful when you apply pressure.
Not only does it ease tension in your foot muscles, it helps stimulate reflex points on the bottom of your feet.