1. Do not attempt to cut the steerer tube after drinking more than 1 beer. Measure twice cut once, don't drink beer in between. Trust me. I learned this one the hard way.
2. Do not smash in the cups with a piece of 2x4 and a rubber mallet. I did it for years. I never had a problem. It was just a matter of luck I never deformed a headtube and ruined a frame. I bought a Park headset press last year and cannot believe how well it works.