What are the really small things that tell a lot about a person's psychology and personality?
YOUR HANDSHAKE
A strong handshake generally reflects an assertive and confident character, while softer handshakes generally indicate a lack of self-confidence. If you have heard this theory before, then apply it and practice having a good, firm and assertive handshake that shows that you have confidence in yourself and take ownership of your personality.
YOUR PUNCTUALITY
Are you arriving late for an important appointment? Whether it's a job interview, a doctor's appointment, or a first appointment, know that while you are struggling to keep up with your lateness, the person who waiting for you forms a bad opinion of you. This must be avoided at all costs. That’s why you have to plan ahead. A very active and motivated person will never be late and will know how to value their time.
credit: third party image referenceYOUR WAY OF TREATING THE SERVER AT A RESTAURANT
Do you have a business lunch? Dinner with your boss and his wife? A date ? Be careful how you treat the waiters / waitresses at the restaurant you go to. Even if you are dining with a very important person like a big boss, for example, you owe it to yourself to be as kind and pleasant to the person who takes your order as you are to the person you are talking to. Make no difference, there is none!
IF YOU BURN YOUR NAILS
Quite often, people who have a tendency to bite their nails (or to pull their hair, to fiddle with their fingers constantly) tend to be very perfectionists and unable to fully relax. So ... it all depends on the image you want to convey.
YOUR WRITING
Your writing says a lot about you, I'm not going to teach you that. Whatever happens, try to perfect your handwriting so that it is as readable and clear as possible for the other person.
YOUR ABILITY TO DROP YOUR PHONE
Are you more of the type who checks your smartphone ten times every quarter of an hour? Be careful, this can also say a lot about you. If you're constantly refreshing your emails or Facebook newsfeed, one study found that you might be less emotionally stable (all of that remains to be verified, of course).