<p>Because I wanted to free up a lot of hard drive space, I ditched Apple's default Mail application on OS X for Web-based Gmail about a month ago.</p><p>(If your computer is running really slowly, you should do this too. Mine was super bogged down and now it's running like a gazelle again.)</p><p>Mostly, the conversion to Gmail has been fine.</p><p>There is, however, one feature I'm always annoyed to discover that Gmail doesn't have.</p><p><a href="http://www.businessinsider.com/it-is-incredibly-frustrating-gmail-doesnt-have-this-feature-2013-1">Keep reading...</a></p>