Take out the trash! Unlike Windows, Linux (at least my distro, Mint) doesn’t have a recycling bin/trashcan icon on the desktop to remind you to empty your trash directory once in a while. That really adds up if you forgot to empty your trash for, uh, a while. Technically you can just hunt down your trash directory and delete everything inside it, but do you really want to have to remember the path? And remember how to find it if you delete a file on a USB drive?
trash-cli to the rescue! The terminal command to install it is sudo apt-get install trash-cli (at least on systems with apt-get), and to run it you just type trash-empty. Thanks as usual to stack overflow for that answer.
When I finally ran that on my laptop, I got 3.6gb back. Not bad for under a minute of work :) If you’re new to Linux like me, don’t forget to take out the trash.