What does it mean that trigger stacking?

Combining multiple trigger conditions for higher-specificity activation.

Example: You want to practice deep breathing before difficult conversations. A single trigger — 'when I feel anxious' — fires constantly: before emails, during traffic, scrolling news. It is too broad to be useful. But stack three conditions — 'when I feel my chest tighten AND I am about to enter a meeting AND the meeting involves a difficult topic' — and the trigger fires only when you actually need it. The compound condition eliminated dozens of false positives per day while preserving every true activation.

Try this: Pick one behavior you want to activate more reliably. Write the single trigger you currently use (or would use). Now add a second qualifying condition using AND. Then add a third. Test the compound trigger for three days and track: How many times did it fire? How many of those were genuine opportunities to act? Compare the hit rate against what a single-condition trigger would have produced.