i have a pretty bad anterior pelvic tilt, and what has helped me the most is overall core strengthening, running, and yoga. sitting more than usual (esp in the summer when we're in the car a lot more) causes me to slip back into bad postural habits. my chiro suggested bridges, hip flexor stretching, and strenghtening the lower abs. good luck!
"God, grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference."