Keep on toes.
[Idiom] KEEP ON TOES. - Stay Sharp and Ready: Idioms for Everyday Agility
Stay alert and ready.
To "Keep on toes" suggests staying alert, ready, and prepared to respond quickly to any challenges or changes. It's akin to athletes staying on their toes during a game, which enables them to react as swiftly and efficiently as possible.
Example Sentences
Stay on your toes during the game.
Stay vigilant and prepared during the game.
The coach reminded the players to keep on their toes.
The coach urges the players to remain vigilant and prepared.
With the new competition, everyone needs to keep on their toes.
With new competition, everyone needs to stay vigilant and prepared.