Sorting your inbox might not seem like a big deal BUT if you have 100's or 1000's of emails in your inbox like most people, sorting like a pro can literally save you hours!
The new default view in Outlook looks like this.
If you change the width of the window - you will see all the column headings displayed. (It's easier if you watch the video than to explain it in steps.)
Once you have the columns visible - you can simply click to sort by that column.
Super simple - but so useful when you're trying to find all the messages from a certain person.