I don't tan naturally - I have skin that goes from white to sunburnt. This is actually a blessing as nothing is as ageing as UV rays! So my tan comes straight from a bottle and I am extreeeeeeemely fussy about it looking natural and flawless. So - you'll have to see my latest article in New Zealand Fitness magazine for the full guide on preparation, application and maintenance. But the right products are 90% of the game.
Having tried and tested many, many products, here are my Gold Standard and the ones to Avoid At All Costs.

Gold Standard
St Tropez Mousse
Clarins Delectable Mousse
Bondi Sands Dark Mousse
Vani-T Spray

Avoid At All Costs
Neutrogena
Garnier
Chi chi