Keeping strict eye contact

While avoiding eye contact or fidgeting nervously are obvious signs of a lie, some liars will overcompensate by maintaining strict eye contact with minimal blinking. (Financial fraudster Bernie Madoff was an expert at this.) This last fact goes to show that no one method on this list can be used exclusively or independently to condemn someone for lying. But, if you suspect someone of lying, they can be good ways to start building your case.