I love shortcuts a lot. They are the most important tool in my productivity tool belt. Helping me to speed things up immensely. Here are the most important shortcuts that I us in Excel all the time:
The first two shortcuts are for inserting the current time and date when tracking my hours for a client in my contractor work. Previously, I looked up the date and time on the system clock and typed them in. This took only a few seconds, but when you try to leave a busy commuter train every second counts. Today, they are just a shortcut away.