Talk to as many people as you know in your office, daycare, school or other facility. Find out who lives in your neighborhood and who drives, and get contact information from people who are interested in carpooling. The number of people in the group will depend on how many people can be accommodated in the participants' vehicles.
Plan the trips. Decide on a time and whether everyone will meet at that day's driver's house or the driver will pick up each passenger along the way. Also pick a time and place to meet at the end of the day.
Schedule days for each driver. Each driver should have a backup driver for occasional conflicts.
Calculate payment. If one person will drive for the duration of the carpool, gas costs should be split evenly among all carpoolers. If everyone will take turns driving, then the cost of gas is equalized.
Set up a communication network. Exchange telephone numbers and email addresses and designate one person as the contact liaison for the group should schedules change or other conflicts arise.