One of the best investments ANYONE can make is a good basic classic cookbook. The Better Homes and Garden Cookbook, Betty Crocker Cookbook, Martha Stewart Classics, The Joy of Cooking, basically any good cookbook by a reputable source with a great test kitchen.
Making basics at home rather than falling back on store-bought pre-made versions cuts tons of preservatives out of your diet and gives you control over the amount of sugar, salt and fats and oils in your food.
You want a good source for basic cooking information and well-tested recipes for classic dishes. Classic cookbooks will not only have a plethora of great recipes, but it will also have great advice and cooking tips, as well as conversion and substitution charts. These books are often written for a wide audience, so recipe difficulty varies from beginner to pro.
You'll find recipes for everything from Thanksgiving dinner to simple snacks to imbibeables. And these recipes are a great starting point if you like to experiment in the kitchen. You can't make a creative new pizza combo if you don't have a good crust.
As easy as it is to find recipes online, it's best to have at least one good source of cooking information. Many online recipes haven't been run through the rigors of a professional test kitchen that The Better Homes and Garden Cookbook recipes have been. Just because something worked in soccermom1963's kitchen and she posted it online, it doesn't mean that she can write the recipe in a clear and concise way that professional chefs and recipe authors do. She might have skipped an important step when publishing her recipe.
When you're setting up your kitchen, take a swing by your local book store and pick up a copy of a great basic classic cookbook, you won't be sorry.