Term Life Insurance
Term life insurance is generally your most cost effective option if all you need is life insurance.
If you are looking for a tax sheltered investment you might want to consider Universal Life Insurance. If you want a savings component, you might want Whole Life Insurance. But the bottom line is this: you will pay administration charges over and above your life insurance premium cost in both cases.
For more information regarding life insurance check out the following pages: Life Insurance, Why do I need life insurance, How do I decide what I need, What types of life insure can I get, Permanent life insurance, Whole life insurance, Universal life insurance, Term life insurance, Other types of life insurance and don't forget to check out the How can I reduce life insurance costs page.