If you are not teaching the people that God has put in your care the true and complete word of God, you are killing them spiritually, and God will not spare you for that. (Acts 20:28)
As you teach them prosperity, also teach them holiness. As you teach them about Christ's love, don't leave out the fact that He is also the consuming fire.
There are all sorts of doctrines goin around these days that are completely opposite to God's word. Don't ignore them; tell your people never to listen to such teachings.
Teach your followers to be like the Berean Christians who always checked any teaching they heard against the word of God. (Acts 17:10-11)
“Whether you are a pastor, head of a department, house fellowship leader, or parent, if you have been placed as a spiritual leader over some people, it is your responsibility to ensure that the devil does not devour them.”
Memorise: Beware of false prophets, which come to you in sheep's clothing, but inwardly are ravening wolves. (Matthew 7:15)