If the shortcuts mentioned don't work, try resetting the InDesign preferences back to the factory defaults.
1) Close InDesign
2) Double click on Adobe InDesign's icon to launch it
3) QUICKLY hold down Ctrl+Alt+Shift. (for Windows) or CTL+OPT+CMD+Shift (for Mac OS X)
4) When a dialogue appears, asking you “Delete InDesign Preference Files?” Click Yes.
If you don't see the question repeat the procedure again.
Right shortcut here is CTRL+ALT+0
Ctrl-0 centers the selected PAGE on the screen. As George mentioned, the correct command is Ctrl-Alt-0. OR you can double-click the hand tool in the Tools panel.
Also: Next Spread is Alt-PageDown.