Tip # 1 : Make Your Intention Sincere

All work we do should ideally be for the sake of Allah. That includes the task of bringing someone closer to Allah. That of course means this should not be connected to arrogance, thinking you're the teacher and everyone else should be lucky you've embarked on a crusade to save them. Guidance is from Allah. Make Dua and make sincere efforts and remember Allah can also misguide you if He wills (we seek refuge in Allah from that).