Here I have captured some very useful IE 7 shortcuts.
Tabs:
Open links in a new tab in the foreground : Ctrl+Shift+Click
Switch between tabs : Ctrl+Tab / Ctrl+Shift+Tab
Open a new tab in the foreground from the address bar : Alt+Enter
Close other tabs : Ctrl+Alt+F4
Open quick tabs : Ctrl+Q
Zoom:
Increase/Decrease zoom (+- 10%) : Ctrl+(+) /(-)
Original size (100% zoom)* : Ctrl+0
* If you are using the recent Windows Vista preview you might notice that the 100% zoom hotkey changed from Ctrl+(*) to Ctrl+0
Search:Go to the Toolbar Search Box : Ctrl+E
Open your search query in a new tab : Alt+Enter
Bring down the search provider menu : Ctrl+Down Arrow
Great new mouse actions in IE7
Open a link in a background tab : Middle mouse buttonClose a tab : Middle mouse button on the tab
Zoom the page in/out 10% : Ctrl+Mouse wheel Up/Down
Tip:
My favorite shortcuts are the middle mouse button actions to close a tab and open links in the background (Those make using tabs fast and easy).
(quoted from http://blogs.msdn.com/ie/archive/2006/02/08/527702.aspx)