Jesus said:

Matt 5:22  But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;

Luke 6:28 Bless them that curse you, and pray for them which despitefully use you.

Rom 12:14   Bless them which persecute you: bless, and curse not.

In otherwords you do not show the attitude of The Devil towards them but the attitude God has toward them.  But this refers to Christians.

Unfortunately non-Christians curse Christians so we need to know how to deal with these curses.

The first thing to mention is that witches complain that curses bounce off true Christians. The first thing you do is to ask the Holy Spirit if you are under a curse.

The thing to ask if The Holy Spirit says you are under a curse is how it gained Entrance.

Proverbs 26 v2 states that a curse needs a cause to affect someone.

Pro 26:2  As the bird by wandering, as the swallow by flying, so the curse causeless shall not come. 

If you are under a curse then ask the Holy Spirit how it gained Entrance. Satan is original so does not need to enter the same way twice.

So the process to deal with a   curse is as follows:

1.      Find out if you are under a curse and how it managed to access you to affect you.

2.      Ask Holy Spirit how to deal with it

3.      Do what He says

You may need to remove an object or repent using the five steps.

If you have given everything you are a steward of to Jesus: yourself, your house, everything you have been given to be steward of (which you say you own), your children and anything else you are told, to Jesus to be Lord of, Satan will have real problems to attack them.

You may need to repent and make Jesus lord of some area of your life.

You may also need to give them protection using the five steps.

If you cannot get past the first step then seek one who can discern spirits or has words of wisdom and knowledge to help you.