It drives me crazy to listen to people misusing words. I stumbled upon this trick to remembering when to say "who" and when to say "whom".
Correct usage of these two words can be determined by dividing a sentence in two.
* Use who when it stands for he, she, they, I or we.
The police issued a public alert for a man who they said was armed and dangerous. (He was armed and dangerous, therefore, who.)It is the board who approves resolutions from the Representative Forum.
* Use whom when it stands for him, her, them, me or us.
Whom do you prefer for these jobs? (You preferred them f or the job.)