Just kidding. I don’t really have such a meter — except in my head.
The progress being metered, as you may guess if you’ve visited here before, is progress towards completion of a book — especially a novel. You can find real such tools scattered around the Writing Web, enabling you to depict your progress en route to some expected goal (a word count, most likely). A particularly snazzy one is at the StoryToolz site (requires free registration); not only does it show the progress linearly, it also provides a link to more detailed information, showing how the daily word count progressed (or didn’t) day-by-day, for example.
In the weekend writing workshop I took years ago (and wrote about here and here), David Gerrold provided us with blank daily progress tracking sheets. Like other such tools, they require that you set a daily word-count goal, using whatever criteria you want. A given writer might work it out like this:
Hmm, I have a day job, so maybe 100 words would be good on those days…
…and maybe 500 words a day on weekends…
…which totals up to 1500 words a week, or on average say 200(ish) words a day.
So you’d set your benchmark at 200 words a day. Every day, without fail, you’d record the number of new words you set to paper, and note the percentage of your target achieved. I forget what the exact rules of thumb were, but David told us that on average, say, a 30% accomplishment, especially day after day, constituted “breakdown”; 50% or above, success; and 80% or above, breakthrough.