Thank and praise God for everything in your life. Thank Him for even the difficulties. It is a sacrifice to do this. But God can turn troubles to triumph. "Through Jesus, therefore, let us continually offer to God a sacrifice of praise - the fruit of lips that confess His name" (Hebrews 13:15).
Don`t allow yourself to complain about anything. During the difficult times, be very careful to watch your tongue. Instead of complaining, think of ways you can verbally offer God the sacrifice of thanksgiving.