We've seen our fair share of shortcut apps in the Marketplace--you know, the apps that allows you to pin "WiFi" to your start screen for quick access, amongst others.
But Supreme Shortcuts (free, XDA) by MJCS is really the Alpha and Omega here. The app so far has nearly 30 shortcuts on board which can be added to your Start screen with a simple click. Just a few of those shortcuts include Brightness, Email Compose, Find My Phone, IE Settings, Internet Sharing, Lock and Wallpaper to give you an idea. Some are even just replacements for existing shortcuts like Zune or Games, giving you a more traditional Metro Tile instead.
We've been running it for a little bit here and have no complaints. Sure, we may not use even half of these, but considering it is free and if we could get just one or two unique shortcuts out of it, it's totally worth it. You do need a developer unlocked device (or ChevronWP7 Labs). Head here to the XDA thread to grab it and participate.