1. Eye movements 

If you want to read somebody's mind you should look at yheir eye movements first since eye movements are the basic way to know what that person is thinking about. 

If the person is looking to there right side it means that they are thinking about an angry situation they have been through or about a person who makes them angry. 

If they are looking to their left side it means that they are thinking about a happy moment or a person which makes them happy . 

If they are looking to their upper right corner it means that they are thinking about a person they love , not just like but love.  

If they are looking to their upper left corner it means that they are thinking about a sad memory or a person that makes them sad or hurts their heart.  

If they are looking you straight on the eye , it means that they are not thinking about a person. They might be think about a memory with a person you have probably seen that day. They are confident that your are not gonna get it if they look at you straight in the eye.