The art of the no-decision decision: getting people to change without thinking. How do you change behavior? We are at mental capacity, and most external attempts to change our behavior fail because they require too much mental energy; any deviation from the status quo is asking too much. Behavioral economists and corporations alike are tapping into this idea of the no-decision decision, from combating obesity with the size of our popcorn buckets to engineering higher game engagement with an ugly carpet. How can we pull this lever to improve user experiences? Which companies are already doing this successfully? By employing semantic technologies we can lower the barrier to behavior change and engineer structures that facilitate the very change we seek – whether it is improving the health of a generation or propelling a social movement from 'awareness' to 'action'.