One possible metric is "time to github commit". Track the timestamp of your first code commit each day. And correlate to how productive the rest of the day is.

One possible metric is "time to github commit". Track the timestamp of your first code commit each day. And correlate to how productive the rest of the day is. I've found that if I can get that first submission in before 9am. The rest of the day really opens up. A hack for this is to leave a little unfinished work the night before. A half implemented function for example. That way there is not too much of a context switch the next morning. And it is simpler to pick up right where you left off. Best of luck ;)