[keep one at a distance] or [keep one at arm's length] […]

[keep one's balance] {v. phr.} To stay even-tempered; not become overexcited. […]

[keep one's chin up] {v. phr.} To be brave; be determined; […]

[keep one's distance] {v. phr.} To be cool toward someone; avoid […]

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

[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 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 […]