E.M.
I am not a mother of a teen, but it wasn't too long ago that I was in your daughters' shoes. Looking back, I think these things would have helped me:
1) consistant family time doing sometihing everyone can find joy in- no work, no school, no TV
2) family prayer, even if the teen choses not to say anything.
3) a parents' appology when warrented, such as losing your temper.
4) allow the teen to fail some
5) volunteer with those less fortunate, especially the elderly
6) Let the teen be involved in making rules, increasing responsibilies, and facing consequesnces of their actions (whether +/-)
Teenagers WILL NOT cooperate with demands simply because of a sense of obligation. True obedience is the outworking of a principle within, so threats and bribery will only make things worse. They must change their heart to learn the joys of obedience.
You probably know most of this already, but these are my thoughts for what they are worth....
Easier said than done, I know. That is why as parents (of all ages) we must PRAY PRAY PRAY!!!
All the best, Liz