This little list might be helpful for some windows users. It is a detailed listing of windows keyboard shortcuts that most people don´t use because they simply don´t know about them. I´am not using many as well except maybe Ctrl+C to copy, Ctrl+V to paste the copied content and Alt+F4 to close a window. Shortcuts are a great way to work faster. The list is not complete but contains about 40 shortcuts.

Ten Windows Keyboard Shortcuts I cannot live without
Add New Keyboard Shortcuts
Set Global Shortcuts in Windows