Religion or no religion.... Humanity exists

In  broader terms, all religions points out to one common character - Humanity. Donation, in any form, is not about your preferences or moral values, but its about Compassion and courage to help human kind, to propagate brotherhood, to enjoy the gratitude of giving and build a better world.

I don't know why we put things off, but if I had to guess, I'd have to say it has a lot to do with fear. Sometimes the fear is just of making a decision, because what if you're wrong? What if you're making a mistake you can't undo? 

 A stitch in time saves nine. We can't pretend we hadn't been told. We've all heard the proverbs, heard the philosophers, heard our grandparents and society. Still sometimes we have to see for ourselves. That knowing is better than wondering, that waking is better than sleeping, and even the biggest failure, even the worst, beat the hell out of never trying.

Learn. Understand. Donate. Save lives.

Here i am sharing what different religions have to say about organ donation, or donation in general:-

Hinduism

Life after death is a strong belief of Hinduism and is an ongoing process of rebirth. It is a perpetual circle of birth and rebirth of the soul, so the physical body is insignificant. This could be seen as reflecting positively on the concept of organ donation and transplantation in Hinduism.

Jainism

In Jainism, compassion and charity are considered to major virtues. Organ donation has been widely supported by the Jain community leaders and monks. It has been reported that in Mumbai, 85-90% of all organ donations including eye donations, are by Jains and Gujaratis (a significant fraction of them are Jain in Mumbai).Gujarat has had considerable success with the eye donation program due to a significant population of the Jain community, which considers eye donation as a sublime form of charity.

Buddhism

According to Buddhism, it is a great Merit to donate ones own flesh for the sake of another. The lord Buddha is also believed to be sacrificed himself by jumping into a fire in order to nourish a lost and starved villager in woods, in a previous life as a rabbit.

The choice of making the donation has to be made by the donor himself according to Buddhism. It's not clear brain death is a form of death according to Buddhism. But if it considered as death, in which case one cannot make decision of ones self, it's a good deed for one who died and also for the ones involved in decision making and contributing.

Roman Catholic medical ethics

In Catholic medical ethics, Pope Pius XII stated that death is determined by medical experts and it "does not fall within the competence of the Church." Advocates of brain death criteria have claimed that this implies that the church is bound to support the view of the medical community on this issue. More recently, the Pontifical Academy of Science has upheld Catholic doctrine.

Islam

The majority of Islamic religious leaders accept organ donation during life (provided it does not harm the donor) and after death in order to save life. Most religious leaders do not accept brain death as a criterion and consider cessation of all signs of life including heart beat as a precondition for declaring death.

Despite this position by Islamic religious leaders, Muslims are oftentimes uncertain about whether or not Islamic tradition considers organ donation to be forbidden. This uncertainty stems from ambiguity caused by conflicting opinions among some Islamic leaders regarding this issue. Moreover, a lack of support along with a generally negative attitude toward organ donation and transplantation has been reflected in surveys of diverse Islamic populations.

Judaism

Jewish medical ethics takes a unique approach. It encourages live organ donation, such as kidney transplant, partial liver lobe (Adult/Child) transplant and the like, when two basic conditions are met, firstly, that the operation does not (significantly) endanger the life of the donor, and secondly, that the recipient's life will be saved through this donation. However, opinions are divided on the issue of organ donations which will permanently end the donor's heart beating, in a case when the donor is brain dead.

Meanwhile, proponents of the brain death criterion, such as Halachic Organ Donor Society have been active in advocating organ donations and transplants either at brain death or even at cessation of heart beat, where donation of corneas and skin is still medically possible.

I hope this helps while you are in dilemma of donating( living or dead) or not donating. God bless.