I haven't eaten meat for a week now! I'm still eating seafood, so I'm not a 'vegetarian', but I'd like to stop eating it someday too...
It's not so hard for me, since I never liked meat very much, but I feel the pressure from my parents and friends... Everybody eats meat in Argentina, and in really big amounts!

Make sure you eat a big variety of fruits, veggies and beans, and you will be fine (Veggie burgers are really good!) You should also try to get enough iron... Lentils are great for this!