Someone actually made a post in the MTT about good links to posts recently.
I think a few of the biggest areas people struggle with, me included, are getting past the middle point of the tourney
link , when stealing blinds becomes far more important. I am eagerly awaiting Vol 2 of HoH where he covers the middle to late part of tournies and those inflection points where your tourney life is made or broken. Vol 1 really helped to get me to the middle parts of a tourney consitently, but I really have to work more on stealing blinds and defending, which I believe are keeping me from being a much better tourney player.