I really agree with Mal, and would really recommend Rachael Ray, as her recipes teach a lot about method, and she encourages you to take her recipes and run with them. I've modified a great many of her recipes to be vegetarian, and I'm sure it's similarly easy to modify them for one or two people. And her recipes are usually simple and tasty
If you don't want to splash out for a cookbook, go pick up a copy of her magazine.
Similarly, if you haven't already--catch an episode of Good Eats with Alton Brown. Again, it's a cooking show all about the method. Once you learn the method, it will be easy to cook for one.
And there's nothing wrong with putting a little cayenne pepper on your Kraft Dinner. I eat that for dinner sometimes when I feel lazy.