Sacrifice, discipline and prayer are essential. We gain strength through God's word. We receive grace from the sacrament. And when we fumble due to sin - and it's gonna happen - confession puts us back on the field.
At age nine, I got a paper route. Sixty-six papers had to be delivered to sixty-six families every day. I also had to collect thirty cents a week from each customer. I owed the paper twenty cents per customer per week, and got to keep the rest. When I didn't collect, the balance came out of my profit. My average income was six dollars a week.