I found a really cool website where you can have physics problem solving competitions with others. It's brand new and it's called PhyKings: www.phykings.com. You can start a competition, pick the number of players, the length of the problem, the type of problem, and once everyone joins, you start solving. You can also submit problems that you find interesting to add to their library of problems. I think it's important to not just solve "canned" physics problems out of textbooks, but to solve problems where the approach is initially not clear, and you have to think on your toes to find a solution. PhyKings allows for the latter type of problems and turns it into a game with others. You can also have competitions with 1 person, in which case you just solve a problem by yourself. I'm not affiliated with this website, I just love the idea of it and I'd like to see it grow. So you should totally join and start solving problems with me. Also feel free to share thoughts.