Grammar issues: ensure, assure, insure

Some words are difficult to differentiate. For those with who struggle with how to use “ensure” vs. “assure” vs. “insure,” I offer the following information:

To “assure” a person of something is to make him or her confident of/about it.

According to the Associated Press Stylebook, to “ensure” that something happens is to make certain that it does.

To “insure” is to issue an insurance policy.