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
Intrapreneurship The characteristic of 3M that enabled it to attain such diversity in its product line is a policy of what has generally come to be called "intrapreneurship". The basic idea is to allow employees of large corporations to behave within the company as they would as individual entrepreneurs in the outside world. ...It is 3M's policy (and that of other enlightened companies) to allow its engineers to spend a certain percentage of their work time on projects of their own choosing, a practice known as "bootlegging". Henry Petroski, The Evolution of Useful Things Cannibalize yourself innovationwork