If there's one common mistake people in this big world make, it's underestimating God's unconditional love and grace. It is so much wider and deeper than human beings can comprehend. There are so many "Christians" that still seem to think that we have to earn grace. Sheesh. The Bible makes it clear enough that every single human being will eventually make it into heaven. The only choice we really have is whether it'll be the easy way or the hard way. Easy way is at least trying to stick to the first and highest commandment - that of love. That's all. I can already hear the sound of fingers tapping away feverishly, so I'll explain a bit.
The Bible says that the Spirit of God will be poured out to all flesh in the last days. This has started happening already. It also makes it clear that all of us will most certainly reach perfection. 1Peter 5:10 comes to mind, but it's somewhere else as well... So, the easy way would be to at least try to listen and obey. The ones who steadfastly refuse to listen will have to suffer through some scary stuff (Like a star that will fall to the earth and cause billions of people to get wiped out) as written in Revelations. So, all those who'd like to catch the first flight into heaven should at least try to get the basics right as written in the Bible. If one could compare getting eternal life to an exam, there would be one question on love, that counts 51%, with a pass rate of 50%. This means that without love, you'll have to walk the hard way. Being judgemental is a sure fire way to make it really difficult for yourself.