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
Three Perfect Tools An Article by Tim Bray www.tbray.org There is a particular joy in a product that just does what you need done, in about the way you expect or (thrillingly) better, and isn’t hard to figure out, and doesn’t change unnecessarily. Here are three to learn from. toolsperfectiondesign