When I am looking a bit pasty I put on some fake stuff - although not to the point of the 'you've been tangoed' look.
I use a Garnier spray one, you can buy in co-op and many other drogeries. After I spray I rub it in with a mitt I got at the Body Shop - stops orange hands and streaks. The tan comes out natural and streak-free.
Stay away from sunbeds, like it was said before, cancer isn't something to mess with.