being consistent calling balls and strikes

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I would appreciate any suggestions re: being more consistent calling balls and strikes. I call league SP only, and a combination of ASA and USSSA.

Also, how do you handle pitchers who whine about balls and stikes? Ignore, tell the catcher to speak with the pitcher, warn the pitcher, or some combination thereof? Ejection is obviously an option at some point. I know umpires need to let many criticisms roll off their backs and not be over-sensitive, and I don't want to eject someone prematurely, but at some point players need to realize that they need to shut up and play the game.

I guess I let people ask me where a ball is if they do it politely, and a spontaneous burst of whining/iritation is ok usually, but if a pitcher (or any other player) won't let it go, they're going to be ejected.