“Plop plop, fizz fizz, oh what a relief it is.” You might have thought that only the pill that goes with that jingle creates relief. But science suggests the jingle’s wording itself elicits relief.

Parallel Power This points to one of the simplest and easiest tricks to help you say things with more impact: Recast the flow of your words into repeating patterns. Create a prime and a follow-up (or ...