Excel is one of those programs. Sometimes it seems as though it's perfectly harmless and easy - until you accidentally hit enter and erase all the data you just spent the entire day creating. With the help of AdminSecret featured writer Richard Rinyai, we've put together this list of the 10 Excel secrets that will help you do your job better, faster, and give you more time with fun projects and less time trying to figure out how to use Excel! Read on for 10 Excel Secrets No Admin Can Do…