My condolences, Frugal Saver!
Several suggestions here have been great. I want to add that I think the most important thing is to make it about the deceased. My FIL's memorial was about not dressing up (he wore bib overalls to our wedding, and I never saw him in anything else until he was sick and wore PJs) and eating friend chicken (his favorite). For a friend who died in a climbing accident, her climbing friends told stories and they had pictures of all her adventures on a pegboard. For a friend's grandmother who was VERY Catholic, they held a Mass. Each of these really was *that* person, which is why I remember them some years later. OTOH, it was very jarring to have to picture my uncle "in the arms of Jesus" which was brought up at his memorial, because he really was NOT that kind of man. It would have been better if everyone had passed around a bottle of bourbon!