When asked this question, we like to tell people it's best done with honesty and awareness. Let them know basically what they can expect. Advise them there will be people there who will be sad and may cry openly; tell them there will be time for some people to stand up and talk about how much they loved the person (but they won't be required to do so). Let them ask all the questions they need to ask, reassure them you'll be right next to them throughout the experience. Never force them to go to a funeral, and always give them the opportunity to change their mind about attending.