36. A barometer/altimeter. I don’t know much about this technology, but I know I’d like to an answer to the question “how high are we now?”. If I would would be able to find a device with an integrated anemometer and thermometer, so much the better.

Edit:

I see I’ve already had this on my list, so I’m replacing it with:

36. A good quality soldering station with a desoldering tool and a hot air jet for reworking SMD components.