If someone has caused you pain or sorrow, never try to take revenge, do not try to do this. Rather try to be patient for the sake of Allah in sha Allah, sooner or later that person will realise their mistake and feel remorse about it in sha Allah. Remember that Allah see’s everything we do, so he is watching when someone wrongs you, so try not to react badly for Allah also see’s what you do too.
When making dua, don’t forget all the people around the world, for someone somewhere is going through some sort of difficulty, so just as we would appreciate kind people making dua for us, then we should be humble in front of Allah and make dua for others too in sha Allah. A sincere dua for the sake of Allah is the best gift one can give to anyone.