Depends how hardcore you want to be about it really... I'd just get some wax on there asap at least. I got some bird poo on mine, and just throwing some water at it washed it off. So at least a good wax, I used some sonax stuff, seemed good. Others say other stuff.
BTW, the dont wash it/wax whatever it is because the paint is 'soft' thats soft from when it was painted, not from when you picked it up. And well, most of the dealers are going to do something to it before you pick it up anyway.
2008 Jetta 2.0 TSI
2010 Triumph STR
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