Want to relax, have a campfire. Last weekend here in Ohio we got a glimpse of Spring with 50 degree temps. We decided to have a campfire around dusk. When everyone else ventured back inside I sat around the file by myself and just enjoyed it. I noticed that I was really relaxed and enjoying the experience. I wasn't really thinking about anything just watching the flames and listening to the slow hiss of the water evaporating out of the wood.
I did a little research and found that it appears that thousands of years ago our ancestors meditated around the fire. There most be something to this.
So if you want a fun way to relax have a fire and enjoy thinking about nothing.