If your diet is at the very least GOOD or better, you don't need to worry so much about this. All that being said. I look for either a liquid or a liquid Gel as those are the most Bioavailable. Take with a meal and you're all set.
Again, with a proper diet, you should be getting most of your Vit & Minerals in your food. Bags of Frozen mixed Veggies are cheap, easy to prepare and there are tons of varieties. Go look in your supermarket, there are so many mixed vegetable blends you can really get in a WIDE array of veggies in every day without keeping 30 different kinds of fresh fruits and veggies on hand.
I try to keep a handful of fresh things, Bananas, Tomates, Lettuce, Onions etc... The things that you will use for cooking or whatever, and the rest of my veggie intake is just microwaving or steaming a bag of mixed Veggies.
For a decent Liquid Gel Multi look for Irwin Naturals, it's what I have been using for a while now and they seem to do the trick. I take 1/3 the reccomended dose to stretch them out as I feel my diet is good.