I would be tempted to select 5 languages to speak fluently, but that might be too concentrated. How about
1) General electronics: Fix the tv, hook the tv up to the computer, wire things to other things.
2) Plumbing. Man, that's helpful.
3) Fluency in Hebrew, Hindi, and Portuguese. I know those are odd choices, but those are the languages of people I know and places I want to travel.