My SOP is to collect a bunch of recipes, try them until I find the ones I like (ie easy to prepare and tastes good). I prefer to have a "menu" of roughly a dozen recipes I most commonly use. When I get bored, ditch them and start over again.
I like this approach. Trouble is that my husband cannot comprehend that I am not using a recipe. Can't seem to get through his head that I am using a recipe, I just don't have it written down, having developed the recipe over the past dozen times I've cooked the thing. I do myself wishing that I had written recipes from time to time though. Forgot the walnuts in my baked oatmeal again last week. Doh!
That said, my other half has been using both How to Cook Everything and Alton Brown's I'm Just Here for the Food and likes them both. He tends to prefer Alton Brown's, but that may be because we like the shows and because it's very prettily laid out--something that is, imo, valuable in a cookbook, unlike in just about any other kind of book.
But if you are looking for a dozen new one- or two-dish meal ideas, then I'd just use the interweb. Don't know if you are at all interested in veggie recipes, but I've been trying to implement vegetarian days/weeks from time to time for nutritional reasons (running alot=high carb+low-fat protein needs, I don't really like low-fat meat in general and my husband sucks at controlling portion sizes of meat), and I have found the recipes at vegetariantimes.com to be mostly very awesome--inventive but in simple ways, not overly complex, and generally of a higher quality than most recipe collections I've found inline. All in all a great source for augmenting an omni diet.
