Impress your boss and co-workers with your beautiful and very useful spreadsheets.
I used to be an accountant and financial controller and I made beautiful spreadsheets all day long for many years.
Learn the basics and more advanced techniques such as conditional formatting. This allows you to do some amazing things such as highlighting negative cells as red so that they stand out. I also show you how to add data bars and color scales to your column of numbers which really brings your data alive and makes it much easier to understand the numbers.
Also learn how to format dates many different ways including adding the day of the week to the date.