Habits
Exercise as a cognitive intervention
The evidence for effects on mood and executive function is reasonable, the effect sizes are modest, and the dose required is smaller than most people assume.
Topic
mood
Every Peppy Talks article tagged mood — 2 pieces across 1 section.
Habits
Sleep is the intervention nobody wants to hear about
It has the largest effect on mood, attention and self-control of anything discussed on this site, and it is the least popular recommendation.