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
All the way through "There's a consistency to physical objects that somehow reads all the way through, so that when you make a physical object, if it lacks the proper amount of weight or if it lacks a certain density...I mean, if its outside says, 'I weigh so much and I have such-and-such a density,' and when you pick it up, you discover an inconsistency there, then you can sense that, you can see it, even without picking it up. It's absolutely essential that everything be done all the way through." Lawrence Wechler & Robert Irwin, Seeing Is Forgetting the Name of the Thing One Sees Invisible substanceA great painting has to be better than it has to beFinished on the insideSigning partyWhy YKK zippers are the brown M&Ms of product designYou'll know it's there objectscraft