The book says the pattern of your small commitments predicts how you'll handle the large ones. I believe it, and I also know most of us grade ourselves on the big stuff.
So, honestly: where is your word weakest right now? Not the dramatic failure. The small, repeated one. The call you keep pushing. The "I'll have it Friday" that keeps becoming Monday.
Post it below with one thing you'll keep exactly this week. Then come back Sunday and say whether you did. No speeches, just the result.