Every now and then I discover a Visual Studio shortcut that doesn't correspond to any menu command. Not all these under-documented shortcuts are truly useful, but a few of them can help you accellerate common editing operations and save a fraction of a second. Adding one fraction of a second today and tomorrow, at the end of your programming career you will save two or three entire days. Maybe in those days it will be raining (quoting Woody Allen), but that's a different story Here are some of my discoveries:

Ctrl+L cuts the current line into the Clipboard
CStrl+Shift+L deletes the current line without copying it in the Clipboard.
Ctrl+C, if no text is currently selected, it copies the current line in the Clipboard.
Ctrl+Enter creates an empty line above the current line.
Ctrl+Shift+Enter creates an empty line below the current line.

Ctrl+Shift+T swaps the current word with the word on its right (word transpose).
Ctrl+Alt+T swaps the current line with the next line (line transpose) thus you can easily move a line elsewhere in the listing

Ctrl+F3 finds the next occurrence of the searched text.
Ctrl+Shift+F3 finds the previous occurrence of the searched text.

Ctrl+F10 invokes the Run to Cursor command in debug mode.
Ctrl+Shift+F10 invokes the Set Next Statement command in debug mode.
Ctrl+* (on the numeric keypad) invokes the Show Next Statement command.

Ctrl+PgUp e Ctrl+PgDn move to the previous and next toolwindow among those that are usually hosted near the right border of the IDE, enabling you to cycle among the Solution Explorer, Properties window, Class View window, etc.
Alt+Shift+F6 e Alt+F6 move to the previous and next window among those hosted in the bottommost panel, enabling you to cycle among the Immediate, Command, Task List, and Threads window.
Shift+Esc closes a toolwindow.

All these shortcuts are active if youselect the Visual Studio's default keyboard configuration. If you enabled a different keyboard configuration (e.g. Visual Basic), some of these shortcuts won't work. You can modify the keyboard configuration in the Keyboard page of the Tools-Options dialog box.