OK, so your parts list will be small for this Instructable:
One sick cast iron vessel
One box of scouring/steel wool pads
One comically over sized block of LARD
(Optional but recommended) BACON
I started off by scrubbing all the old gunk off my pan under running water. Since the instructions I found online suggested that you should season both the inside and outside of the skillet I scrubbed both surfaces clean with steel wool.
Once clean I thoroughly dried the pan and continued to Step 2 "Largmageddon"