I have 50+ campaigns, some of them includes 70 ad groups. And when I start to check where it can be improved, I just forgot previous steps. I tried to keep information in files, but it only make a mess in further. Hence, I waste time on collection of the information, but not on optimization. Please advice some basic principles to be effective and productive. Maybe, checklists, software, anything... P.S. I'm a new guy in PPC.