My main problem was finding easy ways to make them. If it seems too time consuming, etc I wont do it.
raw:
carrot sticks, celery sticks, cucumber sticks - with a fat free dip or salsa
salads - just cause you dont like one type of lettuce.. there are TONS more out there. Add some tomatoes, carrots, cucumber, red onion - whatever you like and there ya go. If you like mexican food, add some salsa to your salad. It adds even more veggies!
tomato slices - pretty good by themselves, you can even marinate them in balsamic vinagree/vinagrette and add some basil for a whole nother taste dimension
cooked:
Zucchini/yellow squash - I cut these in half, sprinkle with some seasoning like garlic powder, black pepper, or whatever spice you like.. and bake in the oven til soft. You could do this with a number of veggies and give it the flavors YOU like.
Green beans - put a can of these in a saucepan, add a 2x2 square of bacon and boil it. The flavor of the bacon goes all through the beans without adding much fat at all.
bell peppers, mushrooms, and onions - sauteed together or eaten with chicken - instant fajitas

Broccoli - I steam/boil this and then add fat free cheddar on top.
carrots - make easy glazed carrots on the stovetop or add carrots and onions to potatoes and a roast in the oven. My dad made these with some marsala wine and they were GREAT. Even my brother in law who hates cooked carrots loved them.
Hiding veggies - zucchini, peppers, and mushrooms can easily be added to any pasta sauce or chili. Soups with veggies in them are a great way to add them to a diet. Baked potato - top it with broccoli and low fat cheese, salsa and low fat sour cream, etc etc. Low fat chicken pot pie types of recipes have carrots, peas, etc in them.
I find that its easy to find ways to get them in if you have an open mind to trying them. Figure out what things you DO like to eat, what flavors appeal to you, and search for veggie recipes that include those or ways you can add veggies to foods you already make.