A neat Lightroom trick for cloning out dust:
Zoom in to 1:1. Starting at the top-left of the image, press the “page down” key. The window will move down the photo until it gets to the bottom… and then jump across and up to the next previously-hidden part of the image. This’ll repeat until you end up at the bottom-right of your photograph. Fantastic!
It’s the perfect way to quickly scan for and spot out dust; you can tell these guys are really passionate about a great user interface. Via an interview with Mark Hamburg, founder of Adobe Lightroom.