We do what Kim C. does but use the traditional "if I die before I wake I pray the Lord my soul to take" as the 3rd and 4th lines. Then we pray for all of our immediate family members (including my SD's mother and half brothers), grandparents and great-grandparents. Then we thank God for our good health and our blessings and ask for things like wisdom, patience, the strength to be honest and guidance in making good choices. We then include special intentions - sometimes we specifically name someone we know who has passed away recently, is ill, is expecting, or is otherwise in need of prayers. Sometimes we keep these broad - we pray for the safety of all soldiers around the world, or victims of natural disaster, etc.
It's a nice way to close out the day, to keep the kids up to date on what is going on in our immediate circle of friends, family and community and to talk about the news and world events. My 13 year olds still ask me to come in and "say the prayers" before they go to sleep and our nightly prayer sessions have been a great way to talk about things that are bothering them. It's a nice ritual.