[keep one's eye on the ball] {v. phr.} 1. To watch […]

[keep one's eyes open] See: [EYES OPEN].

[keep one's eyes peeled] or [keep one's eyes skinned] {v. phr.}, […]

[keep one's feet] {v. phr.} To keep from falling or slipping […]

[keep one's feet on the ground] See: [FEET ON THE GROUND].

[keep one's fingers crossed] See: [CROSS ONE'S FINGERS] (1b).

[keep one's hand in] {v. phr.} To keep in practice; continue […]

[keep one's head] also [keep one's wits about one] {v. phr.} […]

[keep one's head above water] {v. phr.} To remain solvent; manage […]

[keep one's mouth shut] {v. phr.}, {informal} To be or stay […]