there is a spray tan gun you can buy from sally's, it comes with the gun plus one bottle of the tan for about $12, it's a great deal...then you just buy the refills, about $8...it is only one color but it works great...one coat for a light tan, two coats for a deeper tan and so on...i like to always do two coats personally...it's easy to do, i always have someone do it for me to make sure it's nice and even, i used it on a few of my friends last year before competitions and also used it for myself.
there's also a professional product called FAKE BAKE, you can get it in a lotion, mousse, gel...etc. i have it in a gel, and it's incredible, the second you put it on you already have a darker tone, and it progressively gets darker (about 7 hours or so i think) since it is a professional product, you would probably have a buy it at a salon that carries the line, or maybe online as well.
oh one more thing, i haven't personally used these, but i know a few people who have and they work wonderfully as well...the tan towels! they give you a great tan, not orange at all.