Theres only one to use! thats P20 absolutely wonderful stuff. Once a day sun filter - look it up and read about it if you try it im sure you will never use any other product again. Its not cheap - i find Superdrug the cheapest but it is available in duty free at airports.
The best way to tan is to use a false one before you go!
Then use the highest protection factor you can get - no ageing, wrinkles or cancer. Have a great holiday.
Sun tan lotion is a personal thing but this is what we do.
Try Zhuzh Tan Accelorator (http://www.zhuzh.com/) followed by something like Factor 20+ sun lotion of your choice we use Boots Kids Factor 50, and came back with wonderful tans from Tenerife back in September and my partner still had the tan lines at Christmas.
I agree with "Im a BusyBee" P20 is absolutely wonderful,
you put it on in the morning and that's it. You can go in the water as often as you like, and not have to reapply it.
I can't recommend this highly enough. I'm blonde, and I use it all the time and i've never got burnt.