I think that one of the most relaxing things to do is to play your favorite musical instrument. There is something about music that de-stresses. And of course, there is a sense of fulfillment when you can play an instrument even if you do so by yourself, without any audience.
Although the piano is tops among my favorite instruments, I can not really play it. I can play a little bit on guitar and some basic drums. I must admit though that I have to like a song a lot for me to pick up the guitar and play it. If you ask me if I have ever played in public, I would have to say yes 🙂 Once and yes just for one song, I played the drums before an audience. As to the guitar, come to think of it, I have done so for more than a couple of times. But I only play when extremely needed 🙂
Note: This post is also linked with BPC.