This Automator Action collection for Apple’s new Photos app in Mac OS X Yosemite makes your photography workflow a much more efficient and smoother process. In particular, I love the Import image into a specific Album action file. This allows me to quickly add desktop wallpapers and other images I’ve acquired online to a specific Photos album without actually going through the process manually.
There are a ton of other fantastic Automator Actions available at MacOSXAutomation. Be sure to check them all out to see if there’s something else you can use.