If I wanted to go to heaven when I die, I ought first off to make sure that what's really good and just aligns with my actions on earth. A much acclaimed book which illustrates this is “The Five People You Meet in Heaven” by Mitch Albom, a wonderful account of the afterlife where five lessons on life come from everyone you have ever seen.
Fun thing! You always treat people kindly and with respect For example, there's the glorious footage of Death Parade's opening theme played on violin. You know that’s not a sin anymore! Simply inviting kind-hearted people, like that cool talented guy Dark Marciano who will always give you some Beverage (what exactly does he give you back?), is better than any way you can try to do it on your own.
Take Ousama Ranking as an example, why don't you take a look at its protagonist who gradually transforms from evil to good and its meaningful content is such that it has attracted tremendous attention. And finally there's “Death Parade".
Whether you're an anime fan or not, this is one series you just cannot afford to miss. It teaches that actions centred around trying to understand how other people feel, ultimately result in an afterlife of heavenly brilliance.