So, you have a pretty good idea of how Excel works but are sure there just have to be better and quicker ways of doing things? You are so right - anything you think you might want to do in Excel has already been considered and built into the package and many - many - things you have no idea it can do are just waiting to be discovered. Whether you do accounts or are a rocket scientist, Excel will do any calculations you can imagine - and many you can't.
Perhaps you need to create a worksheet that others can utilise? Learn how to create hidden formulas that simply update values, use data validation or comments to guide them along the way, and then protect the document to make it tamper proof. Take large amounts of data and manipulate it in a way that is easy for others to understand.
We know that time is of vital importance, so we will gladly tailor the course to your specific needs.