abridged shortcuts

The new side-scrolling ex-Metro screen is actually just a really complicated Start menu, that has some interactive apps and stuff. Interestingly, the desktop is considered an "app" instead of "the whole point of the OS". In any case as soon as you get used to the fact that you're not meant to dwell on the ex-Metro screen while you're actually trying to use the computer, then you're fine (Y). Anyways, the apps in the store suck. Except this one periodic table one which is really bloody awesome.

And also, when you delete stuff it no longer asks if you are sure. It just sends that shit straight to Recycle Bin (Y)

Windows 8, with it's Charm bar, is not all that charming without keyboard shortcuts. This is a list adapted from Redmond Pie, for the features that I've actually needed to use since getting Windows 8.

Windows = Open/Close "Start Menu", the ex-Metro screen.
Windows-C = Open Charm Bar
Windows-Tab = Switch between apps (via LHS Modern Taskbar, no more Windows Flow or whatever it was called)
Windows-I = Settings Charm
Windows-Q = App Search
Windows-W = Setting Search
Windows-F = File Search
Windows-X = System Tools (cool set of links to stuff like Device Manager, Control Panel, Power Options, Task Manager, and many many more!!)
Windows-L = Locks computer. Different to Windows 7 because the awesome lock screen pops up =D
Ctrl-Scroll = Zooms in and out of tile view (hard to explain just try that shit)

Some that have been around since Windows 7 and prior:
Windows-D = Show desktop
Windows-M = Minimise all windows
Windows-E = Open what used to be called "My Computer"
Windows-R = Run dialogue box
Alt-F4 = Closes current application
Alt-Tab = Switch between open windows (and applications, in Win8)
Windows-UpArrow = Maximise window
Windows-DownArrow = Restore Down, then Minimise Window
Windows-LeftArrow = Snap left
Windows-RightArrow = Snap right