6 myths about the Ides of March and killing Caesar

This is what most of us know about the death of Julius Caesar, half-remembered from movies and plays:
 Some soothsayer said, "Beware the Ides of March."
A few idealistic Romans decided to win back Rome for the people.
Caesar got stabbed by Brutus with a big sword, said "Et tu, Brute?" and died nobly.
 All of that is wrong.
 In major and minor ways, a lot of us misunderstand the death of Julius Caesar on March 15, 44 BC.