Switch to the next window.
ALT + TAB
Create a message.
CTRL+SHIFT+M
Switch to Mail.
CTRL+1
Switch to Calendar.
CTRL+2
Switch to Desktop.
ALT + D
Switch to next message (with message open).
CTRL+PERIOD
Switch to previous message (with message open).
CTRL+COMMA
Lock Screen.
WINDOWS + D
Switches between worksheet tabs, from right-to-left.
CTRL+PgDn
Switches between worksheet tabs, from left-to-right.
CTRL+PgUp