Conference calls are rarely the highlight of anyone's day, and when not run efficiently, they can be a huge time and productivity drain. Here at Dropbox we have a number of regional offices - some thousands of miles and many time zones apart - and we know that sometimes conference calls are the only way to get everyone on the same page. While we're far from perfecting them, we've picked up some tips along the way. Here are 5 simple ways to keep your conference calls both productive and engaging.