PDF to Keynote in a few keystrokes
I have an uncommon-to-most but highly frequent-for-me workflow where I convert PDF slides created from the LaTeX Beamer package to Keynote presentations, which I use in my actuarial education work.
The PDF to Keynote step happens very quickly thanks to an app of the same name: PDF to Keynote.app. I created a short video illustrating how I use this app with LaunchBar.