Tips I have learned over the years. In priority order.
Buy a sonicare toothbrush. They are supposed to be better than even Oral B because of the sound waves they produce. May seem expensive but far cheaper than almost any dental procedure. Studies have shown that electric toothbrushes clean better than manual.
Brush daily.
If you cannot brush one day at least use a flouride mouthwash.
Do not use water on your toothbrush. Something in water hinders the effectiveness of flouride.
Do not rinse your mouth with water after brushing. Leave that toothpaste on your teeth.
Buy a water pik and use it. They clean better than flossing.