Is there a way to pin a shortcut to the WiFi settings on the start screen? It's just one extra click, but sometimes I need it really fast.
There's an app called Connectivity Shortcuts that will allow you to pin a tile to get to your wi-fi settings from your homescreen.
As demonstrated on the newly announced Lumia 640 and 640 XL, Windows Phone 8.1 Update 2 will add the ability to pin individual settings to the Start screen, obviating the need for third-party apps.
For more information, see this article at Windows Central.