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Well, the first thing would be to have a good gunsmith smooth up the action by doing an action job. That means they smooth up the internal mating/working surfaces to allow less friction.
Many people like to install "lighter" springs, but be forewarned, too light can result in light strikes by the firing pin, resulting in misfires. I personally prefer the stock hammer springs with a slicked up action.
Look into gunsmiths who do a lot of work on SA's for the SASS crowd.