To add a widely dispersed group of numbers: While holding down the Ctrl key, click on each cell you wish to sum, and the answer will appear just above the Taskbar at the bottom of the screen. Excel 2007 gives you a bonus: It sums the numbers, and it counts the number of items being summed and calculates their average (see screenshot below).
Ctrl+Shift+D—Double underlines the selected text
Ctrl+Shift+N—Applies Normal style to current paragraph
If you want to change the formatting of a paragraph—say from align left to center—just click anywhere in the paragraph and then right-click, opening this menu:
Then click on Paragraph and make your format selection. Although the menu is slightly different in Word 2007, it works the same.
Caveat: This only works with paragraph formats; for character formats, such as italics, you must select all the characters you want to change.