re: Taking Less with You
It's been discussed in these forums before, but the Fujitsu ScanSnap scanners work very well for digitizing most of your paper-based inventory. You can digitize an entire file drawer in less than an hour or two. It looks like they also offer a portable version of the scanner now too.
That would cut down on much of what is in your GTD travel folders. But it also takes time. After practicing GTD for over 5 years now, I had very thick folders the first year, but subsequently they have rarely grown over 1 inch thick since then.
Hope that helps