Whatever I feel like. I usually like to play sports that I don't really have time to play during the school-year (law school) while also training hard at the gym. Pick-up game of soccer, basketball, go for a good run. I'll also do some bodyweight work if I feel like it. Pull-ups, dips, push-ups but nothing to strenuous. By the end of the week, I'm always itching to lift something heavy.