Chistians will tell you that they fall short everyday of their life but it is only through Grace that they will enter the kingdom of heaven. It is not possible to lead a sinless life. That is the whole concept of Grace. I know it bothers many christians like you, but ALL THAT IS REQUIRED, is acceptance that Jesus Christ is the savior. That he died for your sins. And that only through your belief in him that you will come to the father. The parable of the Vineyard shows that whenever you come to the father, whether it be in the first hour or the eleventh hour, all received the exact same reward.
Matthew 20
9 And when they came that were hired about the eleventh hour, they received every man a penny.
10 But when the first came, they supposed that they should have received more; and they likewise received every man a penny.
No matter how you lived your life prior, No matter how long you lived without accepting Christ, when you do you get the same reward as those that have lived their whole life as a believer.
So the last shall be first, and the first last: for many are called, but few are chosen. Matt. 20:15-16
Not my rules, Gods. Hell I don't believe any of this, but if Christians are going to be Christians they should at the very least understand that being a Christian and accepting Christ as your savior is the Golden Ticket. The idea of belief plus acts was ultimately rejected by the Church at the insistance of Augustine.