Windows 10 tip: Learn the secret shortcuts to jump straight to system folders
ZDNet has a post: Windows 10 keeps a collection of shortcuts to system and user folders. If you know the registered name of one of those folders, you can get to it easily using shell: commands. Here are some useful ones.
Source: Windows 10 tip: Learn the secret shortcuts to jump straight to system folders | ZDNet
Especially useful (IMHO):
shell:Desktop to show the contents of your Desktop folder
shell:Downloads to find where things go to when you download
shell:SendTo to add or remove shortcuts to that right-click menu