Eurail Pass!

After much research and countless attempts to figure out where exactly I'd want to travel and if its even possible to travel to such places, I've purchased my Eurail pass! The one chosen, and the best one, was the Youth Global pass. It allows me to travel freely in 20 European countries for only 50 dollars more than the select 5 country pass (which only allows me to travel to 4 other countries, since Italy counts as a destination). I'm super pumped about this! I ordered it yesterday and was surprised that it had shipped overnight. Now, I've been obsessed with trying to figure out where and when and if I can go to countries that, a few weeks ago, seemed unlikely. Any Suggestions?