Microsoft releases a new version of Office every three years, give or take. And of course Windows is not a static beast; the minute you finish you an OS migration it seems like you're suddenly at least two versions behind again. If you just finished moving to Office 2010 (pictured), for instance, you might not be too eager to kick off a 2013 project right away. The question, then, is what is your long-term upgrade strategy? Will you move through the versions in order, regardless of the actual year? Will you skip every other release? How does this align with your overall business strategy? Moving to Office 365 is one answer; as long as you keep paying the bill, Microsoft's going to keep updating it on a semi-regular basis. Still, it's worth developing a plan; otherwise, you might find yourself stuck on the upgrade treadmill.