Managed to knock out another 3,500 words last night, bringing the current total to a little over 21,500. This actually put me up a bit, which is nice. I just have to average 1,583 words per day for the rest of the month to hit 50,000 words now, down from 1,667. About half of what I did last night was going back and filling in bits here and there, expanding some ideas, giving a bit more exposition, etc., while the other half was pushing the plot forward a bit with a nice conversation between the protagonist and one of his main antagonists.
The plan, then, is to try to average about 1,000-1,500 words per day on the weekdays, and make up any extra on the weekends. If the past week is any indication, I ought to be able to manage that pretty well.