Making the switch from iOS to Android

I spoke to a representative today about my "back ordered" Nexus 4 and was assured that my phone will most likely arrive by Monday. With that said, I think its time for me to start readying myself to make the switch.

So what I'd like to hear is your advice. Apps? Widgets? I have basically zero experience with the platform and everything will be new to me, so let's get a crash course going of everything I'll need, as well as all your favorites.