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Large or Complex - remember me

I'm glad these folks were able to summarize my experience. It sounds so familiar to me.

How Complex Systems Fail (PDF)
Lessons Learned while Working on Large-Scale Server Software (link)

One thing I would add:

Stupidity begets stupidity.  This means the same thing as "measure twice and cut once". This is particularly useful when answering the pager at 3am after getting your drink on all night. This has less to do with your drink than it does arrogance. (a) know when to take action and when to back out (b) make sure your choices are easily revertible (c) keep logs (d) have a battle plan before you start (e) stick to the script (f) have a followup plan to make sure it's complete (g) and an escalation plan in case it goes bad.

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