Dialogs on OS X are really great. They always follow a pattern: Do you want to do something? Here's what will happen if you do something.

Dialogs on OS X are really great. They always follow a pattern: Do you want to do something? Here's what will happen if you do something. [Cancel] [Do Something] For example: Are you sure you want to permanently erase the items in the Trash? You can’t undo this action [Cancel] [Empty Trash] It's also pretty easy to write clear copy when you stick to this system! It's also nice that the non-destructive button is always labelled "Cancel". If unsure what to do; if your cat ran over the keyboard, just click "Cancel" and nothing bad will happen. I only had an issue once when I was working on a kind of activity monitor that displayed running operations and allowed you to cancel them. Do you want to cancel the operation? [Cancel] [Cancel Operation] Yeah, that doesn't work.