Wanted to share a fun/tricky warmup exercise using the G major scale that I picked up in a lesson the other day. The top line is ascending and the bottom is the same pattern descending. Be sure to keep an eye on your alternate picking. Once you've got this down try moving it to other patterns.
During the 10 years of my youth that I played guitar, I pretty much warmed up by playing Master of Puppets or something.
Now that I am actually getting better than I was back then, and now that I am older (31), I find that I am pretty useless if I don't thoroughly warm up.
My warm up is 5-10...