If you see any brother or sister commit a sin that does not lead to death, you should pray and God will give them life. I refer to those whose sin does not lead to death. There is a sin that leads to death. I am not saying that you should pray about that.
Be persistent. Temptation, unfortunately, doesn't just go away when you choose to resist it. Temptation persists. Sometimes the conscious decision to fight a temptation will even make the temptation temporarily stronger. If you decide to resist your temptation to gorge on chocolate, for instance, you may start getting cravings after a day or two without it. It takes time for temptations to fade - some never do. This doesn't mean that you're better off giving up! Fight your temptations tooth and nail. Don't quit, even if you suffer setbacks or relapses. The more persistently you fight, the better chance you'll have of beating your temptation.Never reward yourself with sinful "allowances" or "breaks." Resist the slippery slope of instant gratification.Treat your temptations like bad habits that you must break. Work towards forming new good habits to replace your old ones by repeating good, virtuous behavior over and over again.