What does it mean that triggers are the entry points of behavior?

Without a clear trigger an agent never activates no matter how well designed.

Example: You design a perfect morning review protocol — what to check, how to prioritize, when to stop. But you never specify what starts it. So you open your laptop, see 14 unread emails, and the review never fires. The protocol was sound. The trigger was missing. Three weeks later you find your review template untouched. The system failed at the entry point, not the logic.

Try this: Pick one behavior you've been meaning to do consistently but keep forgetting. Write it as an implementation intention: 'When [specific situation], I will [specific action].' The situation must be something you already encounter reliably — not a time on a clock, but a contextual cue you cannot miss. Tape it where you'll see it at the moment the cue occurs. Run it for five days and note how many times the trigger fires versus how many times you actually execute.