I've learned from Cosmo Cattalano.
And his awesome video blog, How the Race Was Won.
Smart, funny, entertaining, and like potato chips: you can't watch just one.
You'll find out about all the amazing European races we never hear about in North America – surprise! there's more than just the Tour de France over there! In fact, you may find the TdeF to be kinda dull compared to craziness of one-day classics like Paris-Roubaix or the Tour of Flanders.
Check it out.
That said, his T de F coverage is pretty great too.
Full site & vid list here.