The first rule of caregiving is to take care of yourself. If you don't, you are at risk of becoming ill, burned out, or just plain angry. Your good health is important for you, your loved one, and your whole family.
Understand that even though you are family, you are a caregiver. Learn some of the statistics on family caregivers. Find a support group for caregivers, so you won't feel alone. Many resources are available for you. Ask for help!