1.VerbUsed other than figuratively or idiomatically: see do, well.
"He tries hard to tell a good joke but, alas, he does not do it well.; I did well on the first part of the exam, but totally messed up on the essay question."
2.VerbTo take the prudent approach; to be advised.
"He would do well to listen more carefully to his wife."
3.VerbTo benefit, to favour.
"The company did well by his family after he died."