Just bought an HTC 8x...again

I initially picked one up about a year ago when it was released buy had to return it after about a week as there was no Spotify app (I can't live without it). Ive been using an iPhone 5s up until recently when I dropped it and broke the screen. As I don't have the $270 to replace it, I decided to scour the internets for a cheap phone until I could save up enough cash.

My heavily used apps on ios are: Spotify, Facebook, tapatalk, zite, Skype, Google drive, various comic book readers

So my question to you folks, are there any must have apps, customizations, or need to knows for my new(ish) windows phone?