When we are thankful for the people in our lives, it causes is to have a better attitude toward them. 

If you are having issues or there is strife in one of your relationships, start focusing on that person's good qualities and start being thankful for that! When we do that, it causes our attitude to change. 

Lifting up people and being thankful for the, causes the focus to be on them rather than you. 

Ps 69:30 (KJV) says, "I will praise the name of God with a song, and will magnify him with thanksgiving."

When you praise God, and magnify him with a thankful heart, you acknowledge his goodness!

The same is true for people! Start magnifying the good qualities and be thankful for the people in your life!