LOL Troy, I'm a wind bag too.

Here goes...

1) I unstring mine most of the time. During November it's strung all the time, since I hunt nearly every day, don't like string-unstringing that often. There has been no evidence that leaving a laminated bow strung for long periods of time will harm it in any way (most any bowyer will tell you the same). You must be very careful when stringing any bow, make sure string is in the grooves before letting down on the stringer. Stringing miscues have been the death (twist) of many limbs, I'm sure.
2) The Fast Flight, Dyna, 450+ materials do not stretch like Dacron. The older bows' limb tips were not designed to handle the shock delivered by the FF type materials. Troy described it well.
3) Feather selection is mostly subjective, except I've heard the banana cuts can be noisier than the others. Same with 3 or 4 fletch, not much difference. Have always obtained good arrow flight with 3, why should I use 4? Broadheads are a personal choice also. As long as they are sharp and have a cut on contact design, all is good. I prefer to use 2-blade Zwickeys, doesn't matter how they are oriented... no flight problems as long as arrow is spinning good (helical fletch works for me).
4) I use field tips for practice. The difference between them and broadheads are negligible, for me at least. You can use a heavier point to add weight, but you have to understand how that extra weight up front affects the spine of the arrow. The grain/lb question is raised quite often. Some like to hunt with a real heavy arrow, others stay down in the 8-9 grain range. I do know this, if using a lighter arrow you will need to work harder in making the bow quiet, as it does not absorb energy as much as a heavier one. This question leads into the overall tuning of a bow. Arrow shafts... carbon, aluminum, or wood. Whatever the choice, they all have there own ups & downs. But one thing is constant... the spine of the arrow and choosing the correct setup that shoots best out of your bow. I could attempt to go into this in great depth, but I'll regress and suggest the Search function, lots of good reading. My own personal choice of hunting arrows is around 10 gr. / lb. at my draw weight and I use cedars exclusively, just what I prefer. I use a 50# bow @ 28" draw, 500-525 gr. cedars with 125 gr. up front.

About books & videos... Troy has recommended a few good reads, but try be somewhat open-minded and don't take any of them as the gospel of traditional archery. Glean from them as you choose and use the info as what works best for YOU.

Tell you EVERYTHING? hehe LOL... when it comes to finding out what shooting style and what arrows work best for you and your bow... that's up to you and when all the fun begins!