mandy,
your veggies, especially raw, have got more vitamins than meat anyway, except b-12, of which you only need small doses. b-12 is plentiful in dairy, so if you're not vegan you should be fine there. if you are vegan you should supplement (i buy enriched soy milk). there's iron aplenty in green leafys. there's more bio-available calcium in broccoli than in milk, and it's easy to find in other veggies as well. your proteins will come from dairy, grains, beans, legumes, nuts, etc. your pure veggie protein is best if acquired from a few sources at once to make complete proteins, like eating beans and rice or whole multi-grain bread.
there's a bunch of books on the topic of veggie nutrition if you want to go further, and a lot of veggie cookbooks cover basic nutrition.
for those interested in the sociopolitical reasons for vegetarianism, check out the food revolution by john robbins.
good luck.