Quickly change ruler units in Adobe CS apps.
Next time you need to switch from Picas to Inches in one of your Adobe Creative Suite applications, don't go digging through preferences. Simply Right-Click on the ruler and pick your new measurement. This works in Photoshop, InDesign, and Illustrator in versions CS, CS2 and the new Adobe CS3. Enjoy!
Tip: Adobe InDesign adjusts the vertical and horizontal units independently, so you'll have to make your change to the top and side rulers separately.
Source: This tip comes straight from Jason Hoppe's "Intro to Adobe InDesign" class that he leads every quarter at Seattle's School of Visual Concepts. This month Jason has also provided a package of all-day Quark-to-InDesign workshops for several in-house creative teams at Costco.