look clean and keep ur cab clean,
stop driving very aggresively,
don't put that cell phone ear piece and blue tooth while driving cab.

stop talking on phone using bluetooth or ear piece when you have customer in back.

you may be paying hundreds of dollars worth of fine for talking few words on phone while driving with customer's complaint.

you cant talk on phone period, with or without bluetooth and ear phone whole driving a cab and while you have customer sitting in backseat.