Telling someone to get moving

Ponerse las pilas

poh-NER-seh lahs PEE-lahs — To get your act together

"Si quieres aprobar el examen, tienes que ponerte las pilas."
If you want to pass the exam, you need to get your act together.

Literally "to put in your batteries" — a great, very visual idiom for snapping into focus or picking up the pace.

"What I tell myself every January 1st, with mixed success."— Graciela