Mind you, don’t ever hand out compliments unless you are sincerely impressed. But if you are, let the person know.
Preferably in front of someone else.
You’ll feel good for making them feel good – but that’s not the point.
The point is this: unbiased encouragement from someone with no vested interest might prove to be a game-changer for the one receiving the praise.
At the very least it’s affirmation that they’re on the right track.