natalie,
i use no blur in retouching, except when i airbrush on a blank layer. then i may gausian blur that layer to smooth out the airbrush.
generally, i use clone and byRo's degrunge, though i do shade and color sometimes with airbrushing. again, this just depends on the image and work needed.
oddly, i'm not a big fan of crash and burn.... er, dodge and burn. i've used it some but mostly on photo art and not retouching. but, a lot of folks love it. there are a LOT of threads here on
RP about d&b. i dont really know of one in particular. i do use
psp's 'lighten/darken' brush, though, but also sparingly. my opinion on d&b and lighten/darken in
psp is that the tools need a bit of refinement and that may be why i dont use them more. then again, it's probably that i havent really studied the methods much.
all of this is also somewhat of a generality. every image brings its own set of problems. and it also matters a great deal what look you're going for. pageantry retouching, for instance, is quite a bit different from glamour retouching, and both of those are quite different from 'simple' retouching, the kind of thing you might do on a school picture. and a number of folks create or have created their own styles which differ from all of the above.
you might also look into 'painting with light'. this is something that's been discussed on
RP a fair amount also.
skin seems to be the major issue in retouching. getting that 'clean' look without losing the texture is the trick. so, at least semi-realism seems to be the goal. there are a LOT of threads on skin handling. and glamour varies a bit also. one glam mag may have one look, while another yet another look. so, pick what you want as and end result and work backwards.
and just as an extra aside here, i studied one glam mag recently and noticed they were pulling a different trick. they did their retouches and then added an extra step or two in the printing. they were actually adding a sort of gold glitter to the print to make it shine and stand out a bit. a great look at first glance, but obvious on close inspection.