If you want to get a grip on this game then you have to be smarter, you don't need to be psychologist typically but this game demand a touch of psychology.
You need to be always alert about new meetings. If you meet with new people or watch new people then you should try to read their talking style, voice, attitude, behavior, body language, face structure and texture (eyes, eyebrows, nose, lips, teeth, chin, face height, face width etc), hair style, dressing sense etc.