Dragging unwanted apps to the Trash to get rid of them leaves behind hidden files that will eventually take up lots of space on your Mac. There are plenty of app uninstallers to help you do the job properly. AppZapper 1 was always my favourite. AppZapper 2 is even better and is still the best of the bunch.
OS X enhancements
Here are two ways to download desktop wallpaper from Interface Lift, our favourite place to get high-quality, beautiful photos to adorn your Mac.