One little tip I discovered on MacWorld today is how to supercharge your Preview app in Mac OS X 10.5. Here’s the article. What it doesn’t say is, that you also have buttons for rotation and cropping. I always used to lament about preview being such a stupid app, I never thought that Apple would enhance it so much in Leopard.
Also interesting are the options in PDF mode. If you set the sidebar to show you thumbnails of the pages you can now re-arrange, delete and insert them. There are also toolbar buttons for adding notes, highlights and the same ovals and rectangles as with images. How great is that? Of-course you can save your changes too.