Mainly on this site and doing the associated research to write informative articles. I run my business from home so it all fits in rather well.
When I'm not at my desk doing computer based activities, I do get out and about to different places quite a lot. I write travel articles about the destinations I've visited and also take photos to accompany them. I prefer natural scenery and beaches.
I also have family living nearby so they often take up quite a bit of my free time.
Exercise is also important if you do a lot of writing so I try to take a long walk at the end of the day, weather permitting.