When a person is dying what can we do? When a person is dead, what can we do? Do we chant Dorje Shugden's mantra or are there other mantras that are more suitable?
In the event that there are no Sangha member present during the time of death of a person we love, the following can be done. I learned this from senior members in my Dharma center and it is very helpful.
Main thing is to have a Lamrim text. Place the Lamrim text on the person's head. During this, one can recite protector mantra or Om Mani Pedme Hung, which ever one is most familiar with.
Also, if we have consecrated water, drip it on the person's 5 senses - smell, taste, sight, hearing, forehead. If one has protector mani pill, it can be inserted in the mouth.
The behavior of the people around the place is also very important. Now at the time of death, we should not think about ourselves... of losing a person we care. But to focus on helping them to move on from this life to the next. So family and friends present should not cry, should not scream, weep, whatever that will cause the dying person's mind to be disturbed... dont do. It would be best if all present start reciting mantras, and those not of Buddhist believe, pray their own way. The people present should not touch the dying person's body either... especially at the legs, hands, etc... because it will distract the dying person's mind which may cause them to leave this body from the place they were touched. This is bad because if a person leave from the lower body... that will bring him/her to a lower rebirth. So very important.
After death... a 49 day puja can be done to help the deceased find their way to their next life. This is the period of the Bardo. Depending of individuals, some does for 3 days, or 7 days puja... this is entirely up to the family member.
In most cases, cremation is done. To help the deceased to collect more merits, we can take the ashes and do Ruchuk for the person. Very powerful. We can also insert the ashes into stupas... make tsa tsas with their ashes inside and give it to sanghas or people. These are a few great ways to help the deceased to collect merits, making it easier for them to gain a better rebirth and meet the Dharma again in their next rebirth