look like my work here is done!

there isn't much to add to what stealth and musicman and katy have said
one of my key cleaning items is an APC... if you're on a budget you can use it in varying strengths on door shuts, wheels, degreasing pre-wash, interior, headlinings etc... I use autosmart G101 and would utterly lost without it
I agree with a lot of what has been suggested though, especially
wheels - bilberry (although I use autosmart smart wheels bilberry is as good, if not better, just can't buy it in the 25L containers I use)
clay lube - dodo born slippy... dilutes very well
hand polish/pre wax cleanser - dodo lime prime
sealant - CG Jetseal 109 (an all time fave)
wax - many different waxes available and it is all down to choice and expense... Autosmart 'WAX' is getting great reviews although perhaps try Collinite 915 as it is very protective and gives a good finish
interior - use an APC diluted 1:10 and spray onto a microfibe and wipe over, use a clean dry paintbrush or detailing brush for crevice work, and vacuum thoroughly
the key I have found is getting products that work over the long term and don't get used up immediately...
a prime example of this is Bilt Hamber Autowash, its a terrific shampoo that costs about the same as the other shampoos, if not a bit cheaper... its non-corrosive and enviro friendly, but here is the good thing.. you only need 5ml per wash... giving you 60 washes from one bottle... smart thinking

just been looking at the bilt hamber site - third one down for £27 looks like a great deal, for a wash, clay and a wax
http://www.bilthamber.com/bilthamber-special-offers.phpanyhoo... if you're looking at doing this seriously you'll need to get a pressure washer for your pre-wash, door shuts, arches, wheels etc and it makes life sooo much easier... Nilfisk get good reviews (I don't use them myself) and they won't break the bank... you won't need an ultra powerful one... 110 bar is plenty