[theblackkeys]

I really think practicing or playing soccer with some team or a buddy is your best option here. Ball skills, foot work and lateral agility are WAAAAYYY more important than strength and endurance. You also will gain endurance if you practice hard, so you're not missing out.

Running long distances may help you, but you can't really handle the ball at the same time. You can sorta mimic high intensity interval training by just playing the sport, which is great because you're actually practicing the sport.

That said, you could probably work in some weight training in if you wanted, something simple like a full body workout only three days a week, I'd recommend Starting Strength or the 5x5 bill starr/madcow workout. It should be in the stickie, if not there's about a hundred logs for rippetoe.