This is one of those things I can't do. I mean, I can set a quota for myself, and I can hit that quota, but I found that when I did so, the writing started to feel like a chore. Also, it really screwed with my pacing, because I was unconsciously stretching scenes or moments to make them fill that quota instead of writing them the way they needed to be written.
I know quotas are a valuable tool for many (most?) writers, but I've found I have to set less-specific goals, i.e., "get three chapters done this week."