Back to Basics: Learn to Use Keyboard Shortcuts Like a Ninja
Win+b to get to the systray. ctrl+space to Select none in a folder, thus making the folder context menu available, and not the one for files. alt+enter for Properties (for most anything alt+A in a dialog or some other settings box, to Apply settings ctrl+w for closing tabs or windows. I like it so much, I use Autohotkey to make it happen in apps that don't support it— there are some that don't. alt+t+o to open Options in FF and IE. alt+t+a for FF addons.
• Windows 10 Important
Related: Keyboard Cuts