Wasting the sun

I have three days off now and the weather is set to be fantastic. I want to go outside and do something but everyone is at work or up north or revising (God, I hate that last excuse, yuck). I'm struggling to think of what I can do other than go out for a walk, which I will do at some point though obviously I want to do something else.

I've just texted Gareth to see if he fancies playing tennis tonight but I think he'll say no because of the United game.

Help.