The phrase "advise one another" is correct and usable in written English.
It can be used when referring to the act of giving each other advice or guidance in a mutual manner.
Example: "In our study group, we often advise one another on the best strategies for tackling difficult subjects."
Alternatives: "counsel each other" or "offer guidance to one another".
Focus group discussions became opportunities for girls to share thoughts on menstruation, instruct one another on management practices and advise one another on coping mechanisms.
Riders advise one another on where to find the nearest Vélib docking station, where to park if one is full, and how to find the best routes around the city.
They said that agreements on "waterspace management," requiring NATO nations to advise one another of the whereabouts of submerged submarines, did not include vessels carrying ballistic missiles with nuclear warheads, the most potent and most carefully guarded of all.
As the Bears themselves advise one another regarding the week "pace yourself".
Characters advise one another to seek "collateral beauty" ― whatever the hell that means ― so many times that even if you are tempted to cry, your laughter will stave off the tears.
Aside from the financial and potentially political importance of initiatives to bring sex workers together, these were also described as important for psychological reasons: "When we sex workers meet together, we discuss many issues and advise one another.
At the University of California, Jewish students were advising one another to walk in groups after the son of a rabbi was beaten this week.
Who knows if inside the Oval Office, after the rituals of official speeches, the two men "confessed" and advised one another.
Mr. Greenspan said he would advise one client in a given industry to avoid conflicts of interest, taking on as many as 12 in total.
"I never encourage friends to read my work — they sometimes advise one," he quipped.
Maureen Connelly, a partner in McLaughlin & Connelly, bipartisan political consultants, has yet to advise one of her clients to grow a beard.
