Yes: open the case up clean all dust, and clean the fans etc. Remove the heatsink, clean off the old thermal paste, reapply some decent silver paste such as artic silver 5, or there is some diamond stuff now which is supposed to be the best :http://overclockers.co.uk/showproduct.php?prodid=TH-001-ID
reapply some new thermal paste, reseat the heatsink. This should decrease temps greatly.
If you want to further descrease, go into bios and disable smart fan control, its usually in hardware temperature bit. This will put the cpu fan at %100 rpm.
If that still isnt enough then get a decent aftermarket cooler.