My Glocks all get the ultimate trigger stop from Glockparts.com . It gives you an almost zero reset travel. Don't adjust it too tight tho. My G29 has the lightning strike trigger assy as well but for the slightly shorter trigger pull it's kinda pricey.
Mine also have the usual upgrades, extended mag release, extended slide release, ghost ultimate 3.5 connector, 4lb hammer spring ,and titanium plunger. The one upgrade I'm still on the fence about is the NY1 trigger spring vs the traditional style competition trigger spring. (I'm leaning toward the competition trigger spring as I think it makes for a crisper break.) The big trick with all Glocks is to Polish the feed ramp and trigger bars to a mirror finish.
Have fun
G