Wow, you guys go all out.

I am one of those who load them and toss them (after a month or two). Can't keep getting junk (zero balance vanilla cards) in my receipt box.
That said, I hardly reach the 5k limit in any given month (actually, never, and I don't do any of the MO business), so I'm not too concerned about it. I figure my credit card statement and bb account should be sufficient.
The evernote suggestion is a good idea for record keeping though.