If you need to do a "Mail Merge" to print out personalized documents from Pages, you can do it with a simple script. A table from Numbers can be used to customize text boxes in the Pages document and then you can print them all at once.
If you need a clock or countdown timer in your iMovie video, you can create one in Keynote and export it to use in iMovie. You can manually create each second as a slide, or use this simple script to add all of the slides automatically. In iMovie you can adjust the size, color and even reverse the overlay to count down or up.
Many Mac users wish there was a way to create a new text file in the Finder just like you can in Windows. With the help of a simple Automator service you can add this to your Mac, and even customize how it works.
One advantage that Numbers for iPad has over Numbers for Mac is Form mode. If you want to simulate a form in Mac Numbers, you can do it using a few lines of JavaScript code in Script Editor and even make those script available in the menu bar. This could be the starting point for a more complex set of scripts that check values and even allow you to edit row data in a form too.
If you want to make it as easy as possible to call people you can set up a single-action icon that you can tap on your iPhone or click on your Mac to make the call. On the iPhone you can use the Shortcuts app to build a shortcut and place it on your Home screen. On your Mac you can use Automator with a shell script and some JavaScript to place an app in your Dock to make the call with a single click.
You can use JXA in the Script Editor or Automator to set the location of a window to an exact location and size. It is easy to set up the one-line script and reuse it by simply changing the application name and size numbers. You can also create an Automator service to repeat a setting you use often.
There is no way in Photos to get a list of all of the photos that have no keyword tags applied to them. But with a little JavaScript in Automator you can add this command to Photos and use it with all photos or any selection of photos.
Web developers creating pages specifically for the iPhone can ask for GPS location data on their Web pages with some simply JavaScript. See a basic example that can be used to get the latitude and longitude of the iPhone viewing the Web page.