A good eulogy does one thing: it tells the room who this person actually was. It isn’t a list of their jobs, a sermon, or a performance. Pick a few true stories, say the honest and specific things people recognized in them, keep it to about five minutes, and practice it out loud. That's the whole method, and the rest of this page is the detail.
If you also need to write the death notice, that's a different job; see how to write an obituary.
