it depends on how long you tan, and how often you go. you can use the tanning accelerators..i'm not sure they do much good-some people swear by them, others say they just cause the skin to burn. (which is what a tan does, ironically...)
if you're determined, i'd suggest you go for a 2-3 days in a row, for only 8-10 mins (regular bed), then take a break for a day (depending on if you are red), before resuming. most of the time, they recommend less amount of time per day to begin with, for fair-skinned peeps. the ultra-bronze beds seem to get the job done better, i've heard.
although, none of it is good for you. sunscreen is your best friend! the higher the number, the better!
have a good vacay!
at 6:10 PM on Jul. 27, 2010