I use something called Turtle Car Wash, which is available at most of the supermarkets here in Australia, although I think it is made by an American based company. I never bother with using a chamois or a polish because the car seems clean enough after I'm finished and anyway it only takes a short time before it begins to look dirty again....
I just use Windex window cleaner on the glass. Someone once told me that you should use a specially formulated cleaner made for car windscreens because of the effect of some of the chemicals in ordinary glass cleaners on the surface, but they always seem to work allright for me, so I'm not about to spend more money on some thing else.
And of course I vacuum the inside.