Go outside, take a walk, go to the park. Like another mentioned there's websites that tell you about free stuff to do in your area. Google! It's your bestfriend for times like this.
I usually clean up and work outside in my yard. I love to draw, write, paint, and take photo's. I also do that to pass time. Sometimes I'll bake something that I've never tried.
There's many things you can do to pass the time. It just depends what you're into.