Serving size: A marble

"Less is more with oil-based products. Otherwise you'll look like you haven't washed your hair in days," Swayze explains. Massage wax and pomade into your hands first to avoid clumps.

Serving size: A strawberry

If you use too much shampoo you'll wash away the natural oils that protect your hair. With a light massage, apply shampoo to the roots only, says Swayze. Rinsing with water cleans the ends sufficiently.

Serving size: A walnut

Your hair is healthiest at the roots (where new hair growth is) so you only need enough conditioner for your ends -- usually the driest parts of your hair. If your hair is longer than a few inches past your shoulders, you may need a little more product.

Serving size: A pea

Like pomade, too much will put you into grunge territory, and not in the good way. Stick to a tiny pea amount and massage it into your hands first. Then apply it starting mid-shaft and working your way down towards the ends. You can always add more if your hair is longer.

Serving size: A large green grape

Treat volumizers like gel -- too much and your hair gets crunchy. Apply the product to the roots and drag through to the ends. Comb through for even distribution.