Both Microsoft Word and Pages '09 provide an Outline view that lets you collapse your long document into easy-to-review headings of various levels. You don't have to apply a heading paragraph style, however, to change the level of a heading: with the text cursor anywhere in the heading (while you're in the Outline view), press Tab to demote it to a lower-level head—Heading 1 to Heading 2, for instance. Shift-Tab promotes the heading up a level.
6. Hide tool palettes in Adobe programs
The plethora of palettes in Adobe's Photoshop, InDesign, and Illustrator are a wonder on a big monitor, but a necessary nuisance on a laptop's limited screen real estate, where they tend to block parts of the document window no matter how you try to dock them. For an unobstructed view of your work, banish all the palettes instantly with a press of Tab; another press brings them back. (If you're working in a text box, first press Esc to deselect it so that the Tab isn't typed into your text.)