Try to see all these in real life, and a good example on one of that is your own self.
- When a person laugh too much even on stupid things, that person is sad deep inside.
- When a person sleeps a lot, that person is lonely.
- When a person talk less, or he/she talks fast, that person keeps secrets.
- When a person can't cry, that person is weak.
- When a person eats in abnormal way, that person is is tension.
- When a person cry on little things, that person is innocent and soft-hearted.
- When a person gets angry on silly things, that person is in love.
Source: This is not how you source things 
When a person laughs too much, they could be stoned, in love, playing you, hiding something or plan to get in hiding from you.
When a person sleeps a lot, that person could be depressed. Same with talking less than before. It is actually one of the signs of nasty things being planned.
When a person cannot cry, he is missing out. Good way to get rid of emotions at times but best not done too often or in public.
When a person eats in an abnormal way he is compensating for something else.
When a person cries for little things they probably found tears work like a charm to get things done.
When a person fights on silly things, they are compensating for something else, often a lie or lack of self confidence.
When a person tilts his head left he will more often overestimate a problem, when looking to the right he is more likely to tell the truth. People that don't look you in the eye will stab you in the back. A friend today is a trusted enemy tomorrow. If a person keeps looking at you while he is talking he is trying to convince you, if the listener doesn't look at the speaker he appears uninterested. Best way to test character is to put someone in a position of perceived power and wait a year.
Added a few of my own.
