[schuyler_c]

As everyone has said, the mic technique and playing technique are most important. The best solution is to get it right going in rather than try to fix it in the box.

That said, I have had moderate success using a de-esser to minimize fret noise and string squeaks. It won't eliminate them, but can make them far less noticeable. I'm a big fan of Massey's De:Esser because it has more options than the others and works better for non-vocal tracks, though the Digirack and Waves DeEssers are good too.