Posting to follow.
I'm hoping to do this this year. My plan, which may or may not work, is to figure out how much I'm worth elsewhere. I've worked here long enough that my salary has climbed much slower than I would have gotten job hopping a couple times. So I need to find out what I'd be worth going to another company. I then plan to say 'I'd like $X raise. Or... we could keep my pay the same, since I know the budget has been tight, and I'll go to 4 days.' That's the goal, anyway, we'll see if it happens :-)