Fixing rust, what order to do repairs?

['65 chevy lover]

I started off with the intension of just doing minor rust repair and getting my truck on the road. But after pulling the seat out and the floor mats, I discovered that there was way more rust than I aticipated. Both rockers, alot of the floor, both cab corners and below the fresh air vents on both sides has significant rust. Rather than take the easy way out and do a half ass job, I want to fix it RIGHT. Is there a certain order I need to follow when replacing these areas?