JUST ONE THING: PARIS AND AMSTERDAM

Last Thursday night I decided I wanted to go to Europe -- for the first time, by myself, and soon. On Friday I bought a ticket. I leave in two weeks. If you could only do one thing while there, what would it be?
  1. I will be in each city for 3 days, I would like to spend most of my money on presents, and no, I'm not a picky eater.