ok, i have a few ideas -but first i must remind you what pitching is all about.... trickeration and strategery.
catcher signs- dont use 'em. all theyre good for is getting picked anyway. my 7 and under travel ball team played 108 games last summer and never used signs. we just let the pitcher throw what he wants and let the catcher adjust. our ace won 28 games... enough said
arm angles- here's where we pull away from the crowd. we have all pitchers use a minimum of 5 arm angles on each pitch. so instead of you're standard 7 pitches, we have a minimum of 35.
bullpens - we have done away with... instead we play an hour of dodge ball with a specific pitch with tennis balls. we push the cages back, dump out a bucket of tennis balls and go at it. glider day is especially beneficial
new pitches - i heard of a man throwing a sidearm screw ball. never got the man's name, but i think the pitch was called "the foutch"