Remember to warm up and cool down.
Try not to rev it too much before it's warmed up.
and as kimpoy said, cool down the engine before shutting it off.
The longer and faster you've been running, the longer the cool down period (as i remember).
Yung intercooler itself just needs periodic cleaning more for maintaining its efficiency in lowering the incoming air going to the turbo. The cooler the air going to the turbo, better performance. Walang masisira sa loob o sa ilalim. Yung suggestion for cool down is for the turbo itself. Oil kasi ang naglu-lubricate nung turbo internals so you need the oil to circulate for awhile to cool down before shutting down the engine