Well, if you understand the bike tire analogy then the HOW should be pretty self-evident...
Some of the exercises have already been covered. See Rob's earlier post. Mike has already mentioned a few in various posts.
My suggestion would be to look closely at the "warm up" exercises and basic techniques, to see how these basic principles apply... it's right there, hidden in plain sight.
How I would train "it", is slowly and gently. Uke is there to help provide bio-feedback. It is not a contest of strength or you trying to "do something" to uke.
Like Dan says, it's ALL about you... working on YOU. And I would say, the same goes for uke...