There appear to be five major categories regarding how to get to heaven in the world’s religions. Most believe that hard work and wisdom will lead to ultimate fulfillment, whether that is unity with god (Hinduism, Buddhism, and Baha’i) or freedom and independence (Scientology, Jainism). Others, like Unitarianism and Wicca, teach the afterlife is whatever you want it to be, and salvation is a non-issue because the sin nature doesn’t exist. A few believe either the afterlife doesn’t exist or it’s too unknowable to consider.
Derivatives of the worship of the Christian-Judeo God generally hold that faith in God and/or Jesus and the accomplishment of various deeds, including baptism or door-to-door evangelism, will ensure the worshiper will go to heaven. Only Christianity teaches that salvation is a free gift of God through faith in Christ (Ephesians 2:8–9), and no amount of work or effort is necessary or possible to get to heaven.
Atheism: Most atheists believe there is no heaven—no afterlife at all. Upon death, people simply cease to exist. Others attempt to define the afterlife using quantum mechanics and other scientific methods.
Baha’i: Like many other religions, Baha’i doesn’t teach that man was born with a sin nature or that man needs saving from evil. Man simply needs saving from his erroneous beliefs of how the world works and how he is to interact with the world. God sent messengers to explain to people how to come to this knowledge: Abraham, Krishna, Zoroaster, Moses, Buddha, Jesus, Muhammad, and Baha’u’llah. These prophets progressively revealed the nature of god to the world. Upon death, a person’s soul continues its spiritual journey, perhaps through the states known as heaven and hell, until it comes to a final resting point, united with god.
Buddhism: Buddhism also believes that heaven, or “Nirvana,” is to be rejoined in spirit with god. Reaching Nirvana, a transcendental, blissful, spiritual state, requires following the Eightfold Path. This includes understanding the universe, and acting, speaking, and living in the right manner and with the right intentions. Mastering these and the other of the eight paths will return a worshiper’s spirit to god.
Chinese Religion: Chinese Religion is not an organized church, but an amalgamation of different religions and beliefs including Taoism and Buddhism. Upon death, worshipers are judged. The good are sent either to a Buddhist paradise or a Tao dwelling place. The bad are sent to hell for a period of time and then reincarnated.