I had a ton of help from folks in the SSM forum -- notably a guy named NOP, and his wife (cleverly named "MrsNOP"). They tried to warn me even before I discovered my wife's affair, but I was stubborn and didn't listen.
Once I engaged, however, I was pretty much ballz-to-the-wall in full affairbusting mode. I made some mistakes along the way, but we did bust up the affair relatively quickly (the mystique was gone and it was effectively "dead" after about two months; she ended it completely and came back to the marriage after three months).