Julieanne Kost shows off one of the most perennially underused capabilities in Photoshop–namely, the ability to create & use presets that store settings for tools (e.g. common crop dimensions, type styles*, brushes with colors, etc.).
* It’s true, tool presets aren’t as powerful as live type styles (ones where changing the style changes layers to which it’s been applied), but they’re still handy.
This is very helpful tutorial.