Vitamins and minerals support your body in a wide variety of ways, many of them working together.
Few examples are:

Vitamin E helps repair DNA while vitamin B12 helps build it.
Vitamin A supports bone health, as do calcium and vitamin D.
Vitamin D for the Sun Deprived.
Vitamin B12 for Vegans and the Elderly.
Folic Acid for Pregnant Women

Fish Oil. Having a healthy heart is important, and taking a daily dose of fish oil is one of the easiest things you can do to protect it.