WRT High Bar, I also had no idea how to do it really. I did watch some youtube vids. I basically did a set where I normally placed the bar, made reference in my mind where it was, and then made sure it was higher for the 2nd set. It was very uncomfortable at first, so I knew it was in a new position. I was a little worried it may be too high and may cause an injury, but it gradually felt better and better. I knew if I placed the bar any higher, it would be on my neck and I was sure that could not be a good thing. There were a few times where I wanted to quit doing high bar, but I stuck with it because I knew front squats took me awhile to get used to as well. Now I don't even feel the bar much.
I also focused heavily on keeping my chest up and sitting back on the heels, which also seemed to help.
My Favorite Part Of Lifting Is Having The Opportunity
Meet PR's: (May 2014) Raw Natural
Squat 475 lbs
Bench: 286 lbs
Deadlift: 501 lbs
Total: 1262 lbs
Squat: 495 lbs
Bench: 300 lbs
Deadlift: 520 lbs
Total: 1315 Lbs