My husband just got me the new Taste of Home Cookbook for Christmas. It's absolutely MASSIVE and has tons of recipes for all three meals of the day, snacks, appetizers, desserts, etc. They even have a Light and Tasty section with lower fat recipes, but all the recipes have nutritional information listed with them, and many of them are easy to lighten up. There's also a lot of cooking tips and tricks, and substitution lists.
The recipes are submitted by home cooks just like us, not chefs, so the recipes are not intimidating, and the ingredients are easy to find.
Also, my cookbook came with a coupon inside for a free year's subscription to the Taste of Home magazine.
I also recommend the Better Homes & Gardens Cookbook, the classic red and white checked one. That's the cookbook I started off with.