Be well-informed.

synonyms: be on the ball, be with it, know the score, know what's going on.

Roget 490: know, ken [Scot.], scan, wot^†; wot aware^†, be aware of etc. adj.; ween^†, weet^†, trow^†, have, possess.    conceive; apprehend, comprehend; take, realize, understand, savvy [Slang], appreciate; fathom, make out; recognize, discern, perceive, see, get a sight-of, experience.    know full well; have some knowledge of, possess some knowledge of; be au courant etc. adj.; have in one's head, have at one' fingers ends; know by heart, know by rote; be master of; connaitre le dessous des cartes [Fr.], know what's what etc. 698.    see one's way; discover etc. 480.1. come to one's knowledge etc. (information) 527.    ... show more

Roget 498: be intelligent etc. adj.; have all one's wits about one; understand etc. (intelligible) 518; catch an idea, take in an idea; take a joke, take a hint.    see through, see at a glance, see with half an eye, see far into, see through a millstone; penetrate; discern etc. (descry) 441; foresee etc. 510.    discriminate etc. 465; know what's what etc. 698; listen to reason.    ... show more

Roget 698: be skillful etc. adj.; excel in, be master of; have a turn for etc. n.. know what's what, know a hawk from a handsaw, know what one is about, know on which side one's bread is buttered, know what's o'clock; have cut one's eye teeth, have cut one's wisdom teeth.    see one's way, see where the wind lies, see which way the wind blows; have all one's wits about one, have one's hand in; savoir vivre [Fr.]; scire quid valeant humeri quid ferre recusent [Lat.].    look after the main chance; cut one's coat according to one's cloth; live by one's wits; exercise one's discretion, feather the oar, sail near the wind; stoop to conquer etc. (cunning) 702; play one's cards well, play one's best card; hit the right nail on the head, put the saddle on the right horse.    take advantage of, make the most of; profit by etc. (use) 677; make a hit etc. (succeed) 731; make a virtue of necessity; make hay while the sun shines etc. (occasion) 134.    ... show more