Hidden Gems of Microsoft Excel

Most of us spend 50-60% of time performing data processing using tools like Office. Most of the data processing processes are never audited or optimized. Unfortunately, most of this work is being done in the most inefficient way. Most of us never spend any time to understand the useful features of office tools, which will improve the productivity and reduce the time we spent on repetitive tasks.
I will be writing series of small books on the hidden and most useful features in Excel, PowerPoi...