SGMJody cleans his first. Then size and deprime. Then clean the necks and pockets. Then trim. Then polish. Then prime, charge and load. At least this is what we have been doing for my range brass. I believe after the brass has been fired in my AR, a few of these steps will be left out.
Tumble/clean first then de-prime and resize...you don't wanna run gunk thru your resizing die. And second, if you deprime first and then use corn cob, little pieces will get stuck in the flash hole (where the primer used to be) and you get to dig em out....not fun...tedious