I'm halfway through my current large global editing project that is cleaning up the name headings (flipping subfield q and d so that they're in the correct order), deleting obsolete subfield w's in access points, and fixing obsolete indicators in several fields (100, 700, 110, 710, 260) in our oldest records. I looked at the numbers, and I think it'll take 10 more days of work to finish the whole project up. Not bad.
After this project is done, I think I'll go back to concentrating more on straightening up our authority records and name and subject headings - a never-ending job.
While I was doing some subfield q and d flipping, it occurred to me that the technique I was using could be used to fix other problems we have. Since the technique took a bit of work and a lot of testing for me to figure out in the first place, and since every step must be done in a particular order, I decided to save myself future pain by posting instructions, complete with screenshots, in our staff wiki. That'll keep me from having the reinvent the wheel when I finally get around to doing those other fixes.