If you are realy interested, look into NASA's Orbital Debris program. They have a must-read quarterly newsletter: http://orbitaldebris.jsc.nasa.gov/
must-read space debris quarterly newsletter : scientists :: the Masters telecast contains 56 minutes of golf action per hour : golfers
(I happen to be in the latter camp)
That's the problem...there is no viable solution at the moment. I can't even think of where to start, aside from something ridiculous like 'Big Magnets in space!'
The laser-based suggestions sound pretty feasible. A laser based on the moon might even be plausible. The key is that you don't necessarily need a lot of energy to bump a piece of debris enough to knock it out of orbit.