- Inside BJ Fogg’s Behavior Design Bootcamp — see also Day 2 and Day 3.
- Recollect — archive your social media existence. Very easy to use and I wish I’d been using it longer. (via Tom Cotes)
- Duplicating House Keys on a 3D Printer — never did a title say so precisely what the post was about. (via Jim Stogdill)
- Teleduplication via Optical Decoding (PDF) — duplicating a key via a photograph.