What are ways to improve my oral health?

Good hygiene: Flossing and correct brushing with minimal intake of citric acids and sugars coupled with professional prophylaxis should do the trick.

Regular dental care: In addition to dr. Lockhart's answer, seeing a dentist regularly will help to avoid potential problems when they can be diagnosed early. Active decay in teeth can potentially become root canals or one may lose the tooth if not treated. Having regular hygiene visits can maintain a decline in periodontal health and bone loss, thereby helping you to keep your teeth for a lifetime.

Yes: A professional cleaning, scaling and evaluation are critical to dealing with plaque. Proper home care instructions and cooperation will be the next step in moving forward.