We've had this discussion a few times in the past, but I think we're due for a fresh look with how much Terminal has improved over the last couple of OS X versions. So let's see your aliases, EXPORTs, ...

I saw this tip over at OS X Daily today, and it reminded me of all the times I did this as a Mac IT guy a couple of jobs back. See, every so often, the Macs where I worked would start to act weird.