Ask for what you want, but be willing to take what God gives you. It may be better than what you ask for. Practice the attitude of putting everything in God's hands. Ask for the ability to do your best and leave the results to God. Pray for people you do not like or for those who have mistreated you.
Resentment is guaranteed to short-circuit spiritual power.
Make a list of people for whom to pray. The more you pray for others, the more positive results you will note from your prayers.