Good post, and good advice.
I would add, keep your bow wood at near optimum moisture content while tillering.
"EXERSIZE THE LIMBS QUITE FREQUENTLY."
I would amend this, and expand upon it as follows.
Only bend the limbs in order to check the bending, or the tiller, and only draw so far as you need to in order to reveal any flaw. Also watch how the bow responds to work, which part sets. Chances are you will chase flaws all the way up to full draw, at least until you have a few projects under your belt.
Wood does not need to be "exercised." Quite the contrary, every time you pull the bow in the absence of perfect tiller, you are training those flaws into the wood. Once you get the wood bending prefectly, sharing the load equally throughout, THEN work the wood a bit. I prefer to simply leave the bow braced for 10, 30 minutes, 1, 3 then 6 hours, watching at each session very carefully how the bow takes set. Also, rest the bow generously, an hour after each workout, in the hotbox when appropriate. Let it rest back to it's relaxed shape and keep a careful eye upon how that shape changes as you progress. Once you've reached equilibrium, the bow sets the same every time and it is equally distributed in the areas of the limbs you'd intended, then work the bow on the tree, or by shooting preferrably, up to full draw reducing draw weight where necessary.
People will say, if you don't exercise the bow, you'll miss your draw weight. This is a misconception. If you reduce the thickness of the bow too much, too early, you'll miss draw weight. Repeating "you can't put wood back onto the bow." You should plan for the weight you'll lose to work fatigue it is true. I allow 5# to 10# depending upon the design and the material. So, set out to make a 60# bow, if you want 50#, or alternately shoot for good tiller @ 25" draw if you want a finished and worked in bow at 28" draw. Then reduce the bow if necessary once the tiller is right and the bow has been worked in some.
In hindsight, having invested a fair amount of time in this post, there are things you'll learn by doing and there can be no substitute for this exercise. This is one of the things I learned by doing. Maybe it will help save some of you some time, or make faster progress in your journey.