Yeah, that's a tough one. One way is to frame your shot to include more than what you want to capture - then crop-down to the intended composition. Thus you eliminate (mostly) the distortion of the lens edge.
When I was working I always wished that I could go out every morning and shoot. I just wish I hadn't waited so long to do this. I have a less than a week left before I am back to work. But I can say that I made the most of my time off.