pull in the reins

To begin doing something more carefully or cautiously; to regain or tighten control over someone or something. This thesis you're planning is becoming wildly unfocused—I think you should pull in the reins a bit! I wish those parents would pull in the reins on their kids—the little devils are tearing the place apart!

Common Names:

Name	Pronounced	Usage
Kaj (2)	KIE	Swedish (Rare)
Tural	-	Azerbaijani
Noora	NO:-rah	Finnish
Rodolfo	-	Italian, Spanish, Portuguese
ŽIga	-	Slovene
Doriane	-	French