Was reading the Ulyssess review on Six Colors again and found this really cool new feature on the Mac version.
If you want to reopen a sheet you’ve previously been working on, you can do it in a couple of ways on the Mac: One method is to navigate to the sheet in the sheets list. Another method, often better, is to type the keyboard shortcut Cmd-O. A popup will appear containing a text box — it looks like the Spotlight or Alfred window. Type some text from the sheet you’re looking for into the window, and sheets containing matching text appear below the window. Select the sheet you want.
You can also search for Ulysses documents on your Mac using Spotlight, or a third-party search tool like Alfred.
It looks like this.