I loooooove flossing. The trick is to do it while you are sitting and say watching tv. Maybe brush your teeth first so you dont have big chunks, but i dont usually have this problem. Sitting down your back wont hurt and you wont be leaning towards the mirror. Keep the floss handy next to the tv remote!

Also, you know you wrap it around your two middle fingers, then guide it using the index fingers.

Hopefully following for help with my brushing.