It is important when dying to have a peaceful mind. Carers and friends can do much to help as a loved one approaches death.

The most worthwhile thing to do (to help the dying) is to inspire the person to think of others with loving kindness and compassion, to wish others to be happy and free from suffering. If a person dies with the thought of benefiting others, their mind is naturally happy, and this makes their death meaningful.

From ‘Caring For The Dying’, A Collection of Advice for FPMT Hospice Services by Lama Zopa Rinpoche.

People who are dying are frequently vulnerable to guilt, regret and depression. Allow them to express these feelings, listen to them and acknowledge what they say. If appropriate, remind the person of their Buddha (perfect) nature and encourage the person to try to rest in the nature of the mind through the practice of meditation.

From The Tibetan book of Living and Dying by Sogyal Rinpoche (Page 216)