win + space to switch between keyboard languages
win + tab to open the desktop switcher
win + ctrl + t (if you have PowerToys installed) to prevent other apps from stealing focus from your window

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I use the tiles to “pin” programs that I use semi-regularly and can’t be bothered remembering the name of. Or that share an inconveniently long prefix with the name of another program. Or that I have multiple versions of installed, with a specific version I usually need.

I don’t like pinning such programs to the task bar because they add unnecessary clutter while not in use.