Designer, implementor, user, writer A Fragment by Donald Knuth dl.acm.org Thus, I came to the conclusion that the designer of a new system must not only be the implementor and the first large-scale user; the designer should also write the first user manual. The separation of any of these four components would have hurt TeX significantly. If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important. Eating your own dog food making
An ecological cycle In the design of his own residence / workplace, Toshiharu Naka created a small ecological cycle. Rows of green planters in front of the wall protect the house from the sun and help cool it in summer. Rainwater is collected via catch-basins from the roof, and used to water the planters. In the water buckets is a micro-cycle — fish live in the buckets, eating mosquitos from the planters, eliminating the need for pesticides. Toshiharu Naka, Two Cycles Turn them into cycles