[cageface]

I have jj in my .vimrc.

[zem]

vf is the easiest-to-type two-letter sequence i could find that doesn't appear in any english word. other languages' mileages may, of course, vary. (and if some chavfucker wants to object, well...)

[fortes]

I use ;;

[cageface]

Not a lisp programmer, I take it.

[telemachos]

I'm less learned: the first thing I thought was case branches in Bash scripts.