methodology at work v.s. in work
(Great to see you here, Peter; Apple Math, Sci. '96/7)
Before GTD, I was primarily an adopter of new technology, trying to find something that worked for me, without really understanding what it was I was trying to get to work.
After GTD, I have found myself becoming much more of an adapter of all technology, new and old. Most of my attention is focused on the "glue" that binds all the tools and infrastructure at hand. Some of it I have control over (i.e. choosing to use the GTD Add-in for Outlook), while other parts I have to figure out how to make work in spite of the implementation (i.e. the bug and enhancement tracking system which has evolved over the past decade+).
...In a sense, the GTD methodology is self-moderating. By knowing what work, what actions need to get done, I'm better equiped to look at a new tool and figure out what (if anything) makes it more than just another paper-pusher. Yes, I am also more tempted to look at and try more tools to help me get things done, but the looking and trying doesn't get nearly as far out of control for me as it used to pre-GTD.
I wish I knew even half of this back in my University days. Let's just say I was a little more gadget focused than methodology focused when it came to getting anything done. 
Andrew.
If you don't know what to do, do something.