I'm not a very healthy eater, but I am picky and have found ways of dealing with that. Though I don't eat vegetables other than carrots, so I can't offer any advice on that. The smoothie idea sounds good, though I probably won't try it.
What I do is eat very simply. Two bananas for breakfast, a sandwich and a few pieces of fruit for lunch. Dinner, if I don't take the easy way out with hot pockets or a bowl of cereal, is meat cooked in some way. For example, I can cook chicken on the stove, oven, or in the crock pot. I use recipes to look up cook times. Usually I'll use a stripped down version of a recipe, for example, a marinade for the chicken with only the ingredients that I like. Sometimes instead of a meat dish I'll have a potato.
So what I'm saying is make a list of some basic things you do like, find recipes for those things, and then cut out all the parts of the recipe you do not like. Because really that long list of spices, the clove of garlic, and the onion are not essential parts of the recipe, the meat will cook just fine without them.
One thing I do that is healthy is eat a load of fruit. I love fruit, I could eat it all the time. If you regularly eat chips or other unhealthy snack foods, try replacing those with fruit. If cost is an issue, just make sure you are getting fruit in season, I'm always able to find something under $1.50/lb if not under $1.00/lb.