There are many types of woods out there.  We recommend that you keep Hickory, Maple, and Alder in your inventory.

Apple - Pork, Beef, and Poultry.

Alder - Beef, Fish, Pork, and Poultry. Produces a very heavy smoke flavor.

Cherry - Pork Chops, Beef, and Poultry.

Hazelnut - Beef, Turkey, and Jerky.

Hickory - Pork Ribs, Pork Tenderloin, Steaks, and Chops.

Maple - All cuts of Meat like Beef Brisket, Pork Ribs, Seafood, and Poultry.

Mesquite - Fish, Beef, Chicken, and Jerky.

Oak - Red Meat, Game, and Fish.

Pecan - All cuts of Meat like Beef Brisket, Pork Ribs,  Seafood, Poultry, and Smoking.