Bore Solvant, Cleaning Patches, Rem Oil, Rod to push the patches through the barrel.  Clean the Barrel with solvant and patches until they come out clean.  Put a thin coating of rem oil in the barrel via patches to provent corrosion.  Apply a thin coat of rem oil to the outside of the barrel.  If you shot a lot of shells it may be benificial to break down the reciever and clean it also, look in your user manual for directions.  If you don't clean the reciever every once in a while your gun may corrode internally (disaster).