Once you've established who your fellow passengers will be, arrange a meeting to set up some standard rules of behavior. Everyone will be happier if they know what's expected of them, as well as what to expect from the others. This will allow concentration on the business at hand and not on their individual behavior. You should take everything into account when sharing a ride-everything from eating to music to rolling down the windows. Ridesharing experts agree.
Prior planning prevents poor performance.
Ride - You ride all of the time and pay the driver a set amount for picking you up and dropping you off. Share - You trade off, daily or weekly on driving responsibilities. Determine a schedule of who will be driving and how often. Also, a discussion about sharing expenses and other preferences. If each member is driving, determine whether you each want to take a month or week at a time or if each person will drive a certain day of the week.