1. A single finger pattern that works for every major, minor, penta and blues scale and I really mean ONLY ONE SINGLE PATTERN for the whole fretboard!!! I discovered this on my own and it really works. I had already learned all the various individual patterns the hard way before I discovered this. IF ONLY SOMEONE TAUGHT ME THIS ORIGINALLY.... I will be very curious to see if anyoe else has ever discoverd this as well.
2. A chart that shows very clearly why certain scales and chords sound good for a given key. This is nothing earth shattering but it puts it on a single page in a visual way that really ties it all together.
3. A chart that shows why chord shapes look the way they do and why the guitar is designed and tuned the way it is. It is certainly not necessary to understand this because most people just memorize chord shapes. For me this was just "fun" and "cool" to understand the history of the guitar and it also ties ties back to the single "golden" pattern I referred to in number 1.
I will post all three with attachments and explanations. I hope you enjoy them.