I keep all mine in Google docs, stored in a Recipe folder and then sub-folders (Salads, Mains, Cakes, Desserts, etc), which serve basically as tags. So you could put a recipe in the Poultry and Grilling and Quick & Easy and Summer and Kidlet's Favorites folders, for instance.

This obviously has the added bonus of being available to me wherever I can get online, and I can just pull up a recipe, put my laptop on the kitchen counter, and cook away. Lucky people with internet access on their phones can double-check for ingredients while shopping--someday, that will be me (I hope)!