The correct way to tighten new plugs with the crush ring is to tighten by hand and then go 3/4 of a turn with the plug wrench. If you are retightening a crush ring plug, only tighten 1/4 of a turn. Tightening a taper seat plug calls for tightening 1/4 of a turn only. Anti-seize is needed to prevent problems later on. When removing old plugs, break them loose a 1/2 turn and then blow out the plug well with compressed air to get rid of debris.
Tim