Here’s a fun link if you like trying out new wallpapers for your phone: Disney-themed wallpapers for desktops/laptops/mobile resolutions/. And another page full of wallpapers here. There’s quite a lot of wallpapers in these links, enough to have a new wallpaper every month!
I love changing out my phone’s wallpapers periodically – it makes the phone seem fresher and newer. It’s also a great ice-breaker in meetings: something random to talk about while meeting new people.