This will be a short post for me I fear. I would love to be as superorganised as I am in my professional and home life but sadly my knitting stash does not benefit from the same principles.
I do my best to stuff it all into boxes to protect from dust and the dreaded winged beasties but apart from that - it's every skein for himself.
The only exception is my beloved stash of laceweight yarn - none of which I have used yet. I keep it in a pretty box and take it out to stroke it sometimes.
I use Ravelry to keep a track of my projects (both real and imaginary) but that is about as organised as I get. I'm looking forward to reading about others organisational tips though - and plan to even implement a few of them.