Ask HN: What numbers do you pay attention to daily?

I look up the USD/yen exchange rate almost every day. Right now it's 119.96.

How about everyone? What do you track? Doesn't have to be work related!

Weight, outside air temperature, bank account balance, train delay.

My one rep maxes in squat, deadlift, bench and press. To be honest, it's only 4 days/week as that's how often I hit the gym but they are the closest things to your question.