do shell script "defaults -currentHost write com.apple.notificationcenterui doNotDisturb -bool FALSE; defaults -currentHost delete com.apple.notificationcenterui doNotDisturbDate; osascript -e 'quit application "NotificationCenter" ' && killall usernoted" -- this set 'Do not disturb' to false in the pref

Show Desktop

do shell script "defaults write com.apple.finder CreateDesktop -bool true; killall Finder"

Show all windows

tell application "System Events" set visible of (every process) to true end tell