Watch Those Eyes To Read Minds
A persons pupils get bigger when they are aroused, interested and/or receptive. If you look into his or her eyes and see those pupils growing large - it's looking good for you. Basically big pupils (unless it's just dark) mean a person likes what they see.
Try this experiment, and you'll understand how immediate this effect can be. Go right now and look in the mirror at your own eyes. As you look at them, imagine a sexy man or woman you are attracted to - in whatever way would turn you on. You'll see that your pupils get bigger in just seconds.
Actually, if you love to fish, they may get big just thinking about a lake you love. Anything you like to look at can make your pupils bigger. How do you use this to read minds?
Start by watching for changing of pupil size to know if someone is interested in you or what you have to say. And yes, shrinking pupils generally do mean the person is not interested. Just be careful to note if light in the persons eyes is causing the shrinking pupils.
In addition to judging the general level of interest and/or receptivity to you, you can use pupil size to go a little deeper into a person's mind. For example, during the course of a conversation, you can describe various scenes or delve into different topics, while watching the persons pupils. If their pupils shrank at the mention of skiing, and got huge when you described a beach you like, you can be fairly certain they would like the Bahamas over a ski resort.
The great thing about this little mind reading trick is that you can easily test it and refine your technique. Practice by reading minds of friends whose interests you know already, and watch their pupils as you describe various places or even ideas. See if getting them to visualize, by saying something "Remember how that car of yours looked," gets a bigger pupil response.
Mind reading by watching eyes isn't all about pupil size, though. By simply noticing what a a person is watching, you can learn a lot about what is going on in their mind. What kind of women does a man look at? Does he pay any attention to the game on the TV? Note whether he seems bored or interested as he looks at different things. Watching those eyes is one of the best ways to read minds.
