It is a sensitive time and a sad one for anyone dealing with the loss of a loved one. Since death is a certain fact that in most cases would cause grief and bereavement to the deceased's family, the existence and creation of eulogies is also certain.
Some people opt for giving a serious speech about accomplishments achieved by the deceased in their lifetime, while others can decide to take on a more humorous tone remembering the fun times, the good memories and the laughter shared. Like all particulars of the funeral the music should reflect the individual personality of the deceased. These words are enough to show that you sincerely care for the bereaved.
While some are buried in family cemetery plots, others are entombed in mausoleums. If you attended school with the deceased, you might want to focus on your school days. Support in whatever form will be greatly appreciated by the bereaved and will weigh favorably on their acceptance of their situation.
As hard as it may seem right now, it gets better. You can include poems, quotations or passages from the Bible, when appropriate.