Re: copying licks
One thing i am still confused about though is wrist movement - to understand what im feeling put your hand on a flat surface and move it as far left as possible (As if youre moving up the strings) its really limited isnt it? this becomes a much bigger issue when standing up and the guitar is angled upwards and it becomes nearly impossible to reach the B or G string from the E string without being in a lot of discomfort. Is the solution to (and im hesitant of saying arm here because i know youre supposed to pick from the wrist) move your arm vertically upwards when moving to the lower strings so your wrist can keep the same position?
I see what you're saying - yes that upward (leftward) movement is limited. But you shouldn't need to make huge wrist motions when alternate picking. Yes, like you said you can still move your arm up and down to target different strings while the actual picking motion comes from the wrist. See the Petrucci lesson below.
Some people (myself included, although I am away from it) tend to use a lot of finger motion to help cross strings. I'll actually stretch out my fingers to reach the higher strings, and pinch them together to reach the lower strings. My arm still moves, just not quite as much. It's a subtle motion, but it lets you get away with moving your arm less. I don't think that's a great technique in the long run (for me, anyways), because it provides too much variation from string to string. Moving your arm up and down while keeping a consistent picking motion provides more uniformity when picking between the strings. I'm still working on this to find where the sweet spot is....
Here's an example of picking from the arm (generally bad):
http://www.youtube.com/watch?v=hFpcVkRumEY
Eric Johnson Picking Technique:
http://www.youtube.com/watch?v=ACH5Z_YPmVg
Paul Gilbert Alternate Picking Lesson:
http://www.youtube.com/watch?v=CpJNUGHxC3M
John Petrucci Lesson (he uses a very consistent wrist motion while moving his arm up and down):
http://www.youtube.com/watch?v=U8Mr9ZQdGAM
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https://open.spotify.com/album/3InrPujiALJCslZqp9V6e2