It's funny the things we remember sometimes. A little detail - a phrase, a sight, a sound - will stick in our memories, when things we'd much rather remember - where we left our keys, for example - won't come back no matter how hard we will them to.
Sometimes, these things aren't important at all. But often, I wonder if this is really the case. I will reflect more on a particular tidbit of memory and draw connections with other small tidbits. Soon enough, the tidbits form a big tidbit, that I wouldn't have seen before without each of the small bits.
As things are in the large, so they are in the small. See what you can pick up from noticing the details, and you might be surprised.