Sights, trigger, grip, magazines, holsters...
I initially used black paint on the rear sight to cover up the dots, which helped. Then I replaced them with a black rear and TFO front set from TruGlo, which was on sale from Midway. If I hadn't I probably would have tried the 10-8 black rear/fiber optic front sights.
The Apex Tactical Shield Carry Kit, keeping the stock trigger, helped quite a bit.
The gun feels a little slick and the edge of the trigger guard cuts into my middle finger, but I'm not ready to sand and stipple so I went with Talon rubber grip tape. One "finger" of the tape wouldn't stick and I had to trim it off, but otherwise it has worked well.
I tried both the Pearce and NDZ magazine floorplates, but didn't like either.
I just installed an lf-arms.com extended mag release and my initial impression is good.
Buy more magazines.
I have a MagGuts kit (+1 capacity) in the mail for range use.
I have a Blade-Tech Nano holster and it's OK. I wish it had tighter retention and rode a little higher, my middle knuckle hits my belt when getting a full firing grip. The gun is short enough I'm considering switching to OWB, probably a Blade-Tech Eclipse.
You could also have the slide fully serrated for one-handed manipulation and you could have it Magnaported for reduced muzzle rise.