don't put it off another day. Tooth problems do not fix themselves. You have to go eventually. If you are afraid of the dentist look for one that offers sedation so that you sleep through the entire visit.
Be serious about dental care. Brush your teeth twice daily for best results. This helps you remove the debris left in your mouth after eating. Plus, the bacteria that's there will be removed in the process!
Avoid foods and drinks that stain your teeth. This will help keep your teeth white for a longer time. If you do consume foods or drinks that will stain your teeth, brush immediately afterwards. You can also use over the counter teeth whitening methods or professional whitening to keep your teeth white.