If you want to get your output as quickly as possible using excel then learn to use it Smartly.
Eg. If Find and Replace removes all the spaces in a cell then do not spend time on using the trim function on each column.

There can be times when you have to meet a specific deadline and you don't have time to explore Excel.
This may lead to long working Hours and lot of frustration. It has happened with me.
But while at home I try to learn as much as possible and try to remember it so that the next time I am given an Assignment I deliver it before time :D
No one can run away from Excel (at least in IT) and the moment you delve into it you would want to know more!!