How do I write a eulogy for my grandpa?

A eulogy is a speech that is made at someone's funeral. It is made up of all the good things that one can remember about a person. A good thing to include is probably the one thing you will never forget about that person, or your first recollection of who they were, what age you were at the time or the most important thing they ever taught you or how you spent your time with them. Just tell a story, and use a timeline of the past, bringing it right up to the present.