Partly influenced by Rule 3 below, I started making this list a while back.
50 XP See your own app being used by a stranger in public
Under 10k downloads. It was totally unexpected. But it's a good feeling.
50 XP See your own app on a torrent site
This was unexpected as well, especially that this was a smaller app. I did ask them in the comments to buy me a drink if we ever meet. (That's going to be an another 200 XP, at least.)
50 XP Own something before anyone else in your country
#1 Microsoft Band in Hungary.
10 XP / country, 270 XP Visit as many countries in the world as you can
The plan is to keep the expression 'my age < countries I visited' evaluate to true at all times.