Why do (sometimes) seemingly unimportant moments really stick as detailed memories, and some seemingly very important moments are hard to recall?

Question

At times, apparently mundane memories are really easy to recall, and moments you think ‘I want to remember this in detail, even gonna do an eye-camera pan of the scene’ don’t come back that easy. Why?

In: Biology

Answer 1

For instance, why can I recall every line and detail of Tommy Boy but forget important work deadlines that I tell myself, “Don’t forget this!”