Anything I can do to save my teeth?

So recently I've noticed holes and parts of my teeth breaking. I generally used to have a pretty strong white smile. But years of smoking, excessive soda drinking and all that jazz apparently is taking its toll. I have slight staining on the top of my teeth(above the root) and little holes forming on a few. I am putting down smoking and slowing down on the soda. (also I do not eat candy). But Money is really tight and I don't know if I can afford a dentist to get fillings. Is their anything I can do to at least prolong the decay till I can get work done?