Email eats up enormous chunks out of your workday. These days, it's a never-ending battle with the inbox. The downhill slope of productivity starts when we wake up and check our email. We continue to glance at our inboxes countless times throughout the day. A recent survey estimates email takes up about 28% of the average worker's day. The bottom line is email throws off work flow. Not to mention, it's constantly interrupting our leisure time. The following are some of the most popular tools to control your email habit and improve your productivity.