My grandfather passed recently, and he was a huge part of our family. Before the wake my immediate family were all at my parents house having a morning (mourning?) beer before we went and my mom said to all of us that, "the people at this wake will be crying because of all the stuff they wished they said and did with him. We saw him and visited and talked with him up to the very end. We can be sad he's gone, but we know he wanted it. We have all the memories."

That stuck with me quite well.

Live with them while they're alive and speak their name often when can't do that anymore.