How to Make Your Day Last Longer

• Keep Learning - Learning new things is a pretty obvious way to pass your brain new information on a regular basis. If you’re constantly reading, trying new activities or taking courses to learn new skills, you’ll have a wealth of ‘newness’ at your fingertips to help you slow down time.
• Visit New Places - A new environment can send a mass of information rushing to your brain—smells, sounds, people, colors, textures. Your brain has to interpret all of this. Exposing your brain to new environments regularly will give it plenty of work to do, letting you enjoy longer-seeming days. This doesn’t necessarily mean world travels, though. Working from a cafe or a new office could do the trick. As could trying a new restaurant for dinner or visiting a friend’s house you haven’t been to.
• Meet New People - We all know how much energy we put into interactions with other people. Unlike objects, people are complex and take more effort to ‘process’ and understand. Meeting new people, then, is a good workout for our brains. That kind of interaction offers us lots of new information to make sense of, like names, voices, accents, facial features and body language.
• Try New Activities - Have you ever played dodgeball on trampolines? How about jumped from a plane or raced cheese down a hill? Doing new stuff means you have to pay attention. Your brain is on high alert and your senses are heightened, because you’re taking in new sensations and feelings at a rapid rate. As your brain takes in and notices every little detail, that period of time seems to stretch out longer and longer in your mind.
• Be Spontaneous - Surprises are like new activities: they make us pay attention and heighten our senses. Anyone who hates surprises can attest to that. If you want to stretch out your day, this is a good way to do it. Try surprising your brain with new experiences spontaneously—the less time you give your brain to prepare itself, the less familiar it will be with any information it receives, and the longer it will take to process that time period. In fact, overwhelming your brain, is one of the best ways to make time slow down.

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For more insight on time vs brain, check out David Eagleman's fascinating book Incognito: The Secret Lives of the Brain