How do you personally keep cat food fresh?

For wet food, I cover the can with wax paper then secure it with a rubber band before I put it in the fridge. For the dry, I use to keep the bag closed with a rubber band until I got cat litter in a bottle. When the bottle was empty, I cleaned it out properly and now keep the dry food inside. The added benefit was one less bottle in the garbage. So what are your tips?