Good Question, Jun.
Everyone who does Aikido practices the Principles off the mat all the time. The Principles of Aikido are the same principles we use to control our lives in any physical endeavor. These principles are
2. Nexus (or Joining)
3. Break points
We use triangulation and timing each and every time we drive an automobile. We use strategy in every personal encounter. We utilize the priciple of ki, and the nexus when dancing. We use almost all when we play golf, tennis, softball or whatever.
The Principles of Aikido are in essence the rules of life (or its refinement). Fishing requires timing, technique, center, (good fishing requires ki) and strategy.
I believe understanding this is one of the elements that place a persons feet on the path to mastering Aikido.