The most useless smart thing I'm doing right now is rebuilding my checkbook register in Quicken. When my hard drive crashed, I lost four years' worth of financial info. If I want to use Quicken to help me file my taxes next year, I need all my 2006 finances in one place. I just hope what I wrote in my checkbook manually is reliable.
I most smart useless thing I'm doing is de-cluttering on a massive scale to prep my house for sale. Right now, though, the place looks like a Roman army decimated it. Let's just say in my world, things get messier before they get neater.
I'm too much of a peacemonger to remember any battles in great detail.