Allrecipes.com is a great cooking site to help get you started. There is a feature at the top where the recipe search is and you can search for recipes by using the ingredients you have which is great. You can also search by categories such as soups, sides, poultry, etc. Always try to read a few of the reader reviews and they'll usually give you great tips to tweak the recipe to make it better without all the trial and error on your own.
Soups are always a plus for me. I make a batch and have it for a couple of days and then freeze the rest since I live alone.
I usually go out and get my grocery shopping done on the weekend and will come home with a bunch of fresh stuff - carrots, celery, mushrooms and whatever else is in season. I spend a couple of hours getting it all chopped and prepped on the weekend and then use it to make soups and very quick veggie stirfry's that sometimes I add meat to and others I don't! Change the seasonings in the stir fry or the soups to give them different flavors - example: use basil, oregano, parsley to give stuff more of an italian taste...cilantro, cumin, chiles to give it more of a mexican flavor. Anyway, happy cooking!