Mathematics
A few months ago, I knew zero Dutch words. Over the past few months, I have acquired knowledge of one Dutch word: samenzwering. By my expert mathematical calculation, this has created a percentage increase of infinity [calculation: (1-0)/0], a fact that enables me to make the following claim: I have infinitely improved my knowledge of the Dutch language. Aren't you proud of me, Peter? ;)
In other news, I met my first idleThinK reader today (as in, someone who knows me only through idleThinK). A milestone in the log of Strange Ways to Meet People, to be sure.