You may need fewer promises, not more willpower.
Breaking a promise can feel like evidence that you lack discipline. Sometimes it is evidence that you made too many promises while imagining the same spare hour. Exercise, reading, calling someone back, and extra work cannot all inherit that hour in full.
Repair may mean doing less, openly. Renegotiate a commitment before you fail it again. A smaller promise that another person can rely on is often kinder than an expansive one that keeps producing apologies. Capacity is part of the promise, even when you forget to mention it.
Which promise needs an honest revision rather than another burst of effort?
Keep this reflection ↗