You should floss your teeth at least once a day. Flossing in between your teeth removes food debris and plaque from in between the teeth that a toothbrush can’t reach. Plaque causes tooth decay and can lead to gum disease. Another great reason to floss is that recent studies have shown that flossing helps to prevent a heart attack or stroke.

When flossing, be sure to gently insert the floss in between the teeth, without snapping, which could damage the gum tissue. Gently move the floss up and down into the spaces between the gum and teeth. Floss the sides of all of your teeth, even if there isn’t a tooth next to another one. There are a number of dental products available that are designed to make flossing easier, such as disposable dental flossers.

Source: about.com

Do not chew ice! Teeth can crack in very painful and non-restorable ways from chewing ice or hard candy.  Biting in just the right direction can split a tooth, usually one with a large silver filling.

It is very important to get crowns (caps) done when suggested.  Teeth not adequately supported and protected can result in tooth loss (extraction) and the need for a more lengthy and costly treatment such as a fixed bridge or implant.