If you forget everything else, remember this: Same author, multiple works = one parenthetical with semicolons, one entry on Works Cited with three dashes. That’s it. No incantations required.
You’ve now mastered the trick that makes first-year English majors cry. Go forth, cite like a hero, and never repeat an author’s name unnecessarily again. Unless you’re writing about Shakespeare. Then you’re stuck repeating that guy forever. He’s the one who started this mess, honestly.