Routine blurs.

I don't get why people say, "I once went/did/etc....." And, while it obviously left a tangible impression on their memory, they're content with just that one slowly fading indent. If something blows your mind, do it again. Then find other things like it, or things that are completely unrelated, or completely opposite. Find something--anything--that makes your mind do what it did. Routine blurs. Break the routine, and your entire life will become vivid again.
And either this is a lot harder than it sounds or I'm a hypocrite, but when you go to "do" a day, you do what you know. So you have to know what you don't know, unless you're content with being content.