Wash and rinse with tepid water because hot water brings out the natural oil. Use very little conditioner and rinse it out thoroughly. Final rinse 1/4 c lemon juice in in 2c cool water. rinse that out. Towel dry and blow dry on cold. No heat.
Do the baby powder thing and skip washing your hair the next day. I know it's hard. But you can literally train your hair to not get so oily so fast. Washing your hair with shampoo strips the natural oils from your hair. This causes you to produce more of the oils to make up for it. So just hang in there. It gets better with time. (: