Like Big Uncle posted, the in-stock recoil reducers are a quick and fairly inexpensive method of reducing felt recoil. There are both mechanical and mercury filled models that sell for under $50, and with a very little woodworking skill they are easy to install in just about any rifle or shotgun stock. They add about 8 oz to your stock's weight so the added weight plus the action of the reducer combine to absorb some of the kick.

I use both kinds and can't tell which is better. They both work. I installed one in each of my Trap and Skeet shotguns, my 870 field gun, and in the stocks of my .375 RUM and .300 Weatherby.

Just drilling a hole in any stock and filling it with lead will add weight to any gun and it will help to reduce the felt recoil.