http://esa.academia.edu/LeopoldSummerer/Papers/409879/Concepts_for_Near-Earth_Asteroid_Deflection_Using_Spacecraft_With_Advanced_Nuclear_and_Solar_Electric_Propulsion_Systems
Interesting read. Same technology could be used to pull dead satellites out of orbit.
Based on what I have read we’ll probably get hit with an asteroid that we won’t see coming before we ever develop any technology to deal them.