They taste close enough to the real thing to fool the unsuspecting diner, although you might have to try several different brands before you find the one you really like best. Explore the many vegetarian convenience foods available. Check natural foods stores for instant soup and main-dish convenience items, as well as regular supermarkets. Many canned soup flavors that you're probably already used to are vegetarian, like black bean, minestrone, and vegetable. Order pizza without the cheese but piled with vegetable toppings, like peppers, mushrooms, or even artichokes.
Vegetarian cookbooks are a great source of inspiration.
Libraries and bookstores have a wide selection of vegetarian cookbooks that will show you how to use less familiar staples such as tofu, TVP, and seitan. You can use tofu in just about everything. It's especially good in stir-fries. It's fat-free and has a texture like ground beef. Try it in tacos, chili, and spaghetti sauce.