This was my thought as well. Increase self-efficacy by emphasizing successes. Increase happiness by emphasizing joys.

Since it's clear our memory is already false to a considerable degree (or holographic rather than photographic, if you like), and since memories/beliefs have an outsized influence on our feelings/thoughts/behaviors/actions, this seems like a great opportunity for, er, "ethical self exploitation".

Hacking, if you will.

I'm certain there are many methods for doing this very thing.