BE CAREFUL &c. adj.; reck [archaic]; take care (be cautious) [See Caution]; pay attention to [See Attention]; take care of; look -, see- -to, -after; keep an eye upon, keep a sharp eye upon; chaperon, matronize, play gooseberry; keep watch, keep watch and ward; mount guard, set watch, watch; keep in -sight, - view; mind, mind ones business.
look sharp, look about one; look with ones own eyes; keep a -good, - sharp- lookout; have all ones -wits, - eyes- about one; watch for (expect) [See Expectation]; keep ones eyes open, have the eyes open, sleep with one eye open; catch a weasel asleep.
do ones best [See Activity]; mind ones Ps and Qs [colloq.], speak by the card, pick ones steps.
TAKE PRECAUTIONS [See Preparation]; protect (render safe) [See Safety].