put on (one's) thinking cap

To begin thinking or considering very carefully and seriously (about something). If we all put on our thinking caps, I'm sure we can come up with a way to earn enough money to go to the baseball game this weekend. A: "Well, boss, what do you think we should do?" B: "Just let me put on my thinking cap for a minute."

Common Names:

Name	Pronounced	Usage
Boitumelo	-	Southern African, Tswana
Mateo	mah-TE-o (Spanish)	Spanish, Croatian
Yocheved	-	Hebrew, Biblical Hebrew
Bohuslav	bo-hoo-SLAHV (Ukrainian)	Czech, Slovak, Ukrainian
Madelaine	-	English (Rare)
Jonathan	JAHN-ə-thən (English), YO-nah-tahn (German)	English, German, Swedish, Norwegian, Danish, Dutch, French, Biblical