u need to get the plugs replaced, air filter replaced, throttle body serviced. if ur local mechanic has the tools to recalibrate the throttle, then u can get it done from him (most mechanics dont have it, mine does!) otherwise go to honda dealer. they dont really tune it or re program the ecu, they just calibrate the throttle position sensor. make sure the engine is at operating temperature when they do that (after all the tuning is done) let the engine run for a few mins. otherwise, if u do it on colder engine, ur car will idle at higher rpms.
u may also need to get the fuel pump/filter replaced if u havent done that already. its supposed to be changed at 40k kms.