I just want to point out that many of the suggestions mentioned are covered on this wiki page:
http://wiki.project1999.com/Advanced_Techniques_Guide (and I actually added the bit about /corpse ignoring the z-axis to it from this thread).
Perhaps I should revise my one suggestion to just be "go read that page"
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Also, as always, I should emphasize that it's a wiki, so if I got anything wrong (eg. I'm pretty sure you don't need to be indifferent to bankers to use them, so the "sneak banking" section could use a bit of revision) feel free to just click edit at the top and fix it, because it's a wiki!