Minecraft wiki entry for Time-saving_tips, associated text: Once your food supplies are secure, or if you are playing in peaceful mode, you can speed things up a little by sprinting everywhere. Double-tapping the forward button or using your sprint button (default is Left Ctrl) will cause you to sprint. In harder game modes you should avoid doing this until you have plenty of food available, because it uses a lot more energy than walking does and only gives a slight speed-up. However, if you can sprint while holding the jump button, you can go a lot faster. But be careful, or you will waste hunger by hitting an object above you.