After attending a class at National Guitar Workshop last summer (TGPer harryj's Blues & Beyond class - highly recommended), I realized that my command of the neck was considerably weaker than it should be. Upon my return home I set out to change that. Here are two completely mental - no guitar in hand - exercises that I believe have helped me a lot. Hope they can help anyone with similar issues. 1. String-to-string intervals: I learned the CAGED system a while back and it was an eye opener but it didn't address the issues of either building chord voicings from scratch or analyzing known voicings. I decided to memorize the string-to-string same-fret intervals for each possible string location of the root. For example, if the root is on the 6th string, what is the interval from that root to the same fret on the 5th, 4th, 3rd, 2nd and 1st strings? In this case, the intervals are 4th, dom7th, min3rd, 5th and root. Rather than sit down with guitar, I did this by visualizing the neck in my head and working out the different intervals, repeating them over and over until I had them memorized for each root string. Now if I want to build a chord with a root in a particular place, I can figure it out pretty quickly by picking the intervals from the same and adjacent frets based on my knowledge of the same-fret intervals. 2. Note positions on the neck: I had a pretty good grasp of note names at positions up to about the 5th fret but was weak above that. I started a new exercise to identify and memorize the note names at each marked fret (3rd, 5th, 7th, 9th, etc.) working both up each string from open position and across the board at each marked fret. After a few days of that, I can now almost instantly name the note at each marked fret of each string and can easily identify the notes at adjacent and nearby frets through interpolation. In truth, I spend about and hour between 4:30am and 5:30am every morning sitting with a cup of coffee in hand and the dog in my lap waiting for the others in my house to get up and really needed something to occupy my mind during that time. I think I put the time to good use.