Certain practices such as learning halachot daily or reciting ashrei three times a day are supposed to guarantee a person a place in olam haba. How exactly does this work? Can a person be an evil sinner but perform one of these charms and magically be absolved of the sins? Why would that be the case?
Is it more of a descriptive thing [ie anyone who would set aside time daily to study a halacha is the kind of person who has her priorities straight and the probability of her making it to heaven is really really good]? If this is the case, why were certain acts chosen over others [seems random]?