Repent by the sacrament of confession which requires true repentance and honest, best efforts to avoid sinning again. And doing penance. It is not the trivial thing some would make it.

Cutoff date is death - when the elevator goes either up or down. Without repentance and forgiveness you're in the position of the man gathering sticks.

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.