Before you do or say something, ask yourself, will Allah be pleased with me for this, or is this something that He disapproves. It is that simple! When you talk, ask yourself is this beneficial for me in this world and the hereafter or would I be indulging in backbiting, gossiping or just wasting my time in useless speech, when I could indulge in dhikr and repentance?
When you buy something, ask yourself is it for a halal or haram purpose?
When you feel like losing your temper on your loved ones or parents, ask yourself is this really worth it? Is it worth me losing my protection from hellfire? Is this anger more important than Allah’s likes and dislikes?