Hazel is already great way to automate cleaning up your Mac, and it's also great for photo organisation. Blogger Jacob Salmela shares a script to sort photos you upload to Dropbox into location-based directories.
Dropbox's auto photo upload feature is great, but it just dumps all your photos into a single directory. Salmela's script sorts those photos by location and into separate directories. If you're sick of using photo management apps, but like the location-based organisation that usually comes with them, this script makes it a heck of lot easier to organise photos. Head over to Salmela's site for the full guide.