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If you got 100 new messages, how long would it take you to get through them all? An hour? Five minutes? How would you find the important ones, reply to the ones that require an immediate reply, and mark the ones that you needed to take care of later? Would you use stars, filters, keyboard shortcuts, labels? What about Gmail Labs like tasks or canned responses?
Everybody has their own system for managing email, but some are definitely more efficient than others. Even if you only get a few messages a day, there are probably some simple things you can do to make it easier to get through your inbox and maybe even have a little fun along the way. We know time is valuable, so we asked lots of Googlers for their tips and tricks on how they make the most of Gmail, and we combined the best of these into a guide at www.gmail.com/tips, cheekily entitled "Become a Gmail Ninja." The tips are categorized into ninja belts (white, green, black and master ) based on how much mail you get each day.
Official Gmail Blog: So, you want to be a Gmail ninja?