For those of us that have been in it for awhile -- keeping abreast of what is going on, reading about "new paradigms" and how they may just be new incarnations of what we have seen before, continuous learning is key.
For those getting started, battle stories can be interesting and provide insight.
Don Melton's blog - http://donmelton.com JWZ's blog - http://jwz.org The * at Work series (Coders, Founders, etc.) Usenix archives on the subject of choice
Are some that come to mind. Others are there, but it's been a long day and I am a bit burnt.
What do others read for their history lessons?