Heat wrap the headers, heatwrap the DP until it's about 1' into the underside of the car (deflects heat while still minimizing backpressure), get a blanket for the turbo, upgrade to silicone hoses, use a higher percentage of water in the coolant ratio (also add Royal Purple "Purple Ice"; better than water-wetter), go for a higher quality oil (insert Royal Purple plug here), increase the size of the hood scoop, wire the water spray to come on under WOT, look into spraying meth, get N20 or C02 for intercooler (note that water and C02 is corrosive), add heat shielding to your CAI (go buy one of those foil windshield heat deflectors, cut it to the right size to wrap your CAI pipe loosely, zip tie), TB coolant redirect, clean your radiator (lol), modify your stock turbo heat shield to fit your DP (then cut strips od DEI exhaust wrap and silicone glue it to the inside of the heat shield; take DEI silicone spray and add several light coats to the inside and outside), lower PSI radiator cap (or, in your case, coolant reservoir cap), move the 2 coolant lines away from your CAI (even if it means extending them or *GASP* using zip ties), remove the bracket from cyl. 3 to up pipe (just look, you'll see it -- unnecessary, direct heat transfer to motor from exhaust).

Can't think of any more right now, but that's a good start that will REALLY add up. I saw a visible differece in the temperature gauge on my car!