Be sure to brush at least twice daily for about two minutes each time. Flossing once daily is fine.
Plaque will turn into calculus in about 12 hours. As you know, it's much harder to get off then. A good professional cleaning will always take 45minutes or so even if your teeth are spotless so your hygienist is going to always scrap. She.he can also reach areas with the proper tools that you can't with a brush and floss.
When you brush, try to use a circular motion. Use a soft toothbrush so that it can reach as many places as possible, and be gentle. You're not trying to scrub your teeth so hard as to injure the gums.
If you brush TWICE a day, for a full two minutes, it would be hard for plaque to stick to your teeth.
Good luck. It sounds as though you are very conscientious in your dental care.
My best to you,