The general specific ways are various, and vague. If you can, it helps to look for three or four different indications before you accuse the person of lying outright, or decide not to take them at their word. 

 

 

When people touch any part of their face while speaking, it can be an indication that they are lying. Usually they will touch their eyes, their nose, or their lips. These are usually rapid, subconscious movements. Be careful, though, as this may also be an indication that they are simply nervous. Another indication of lying is excessive blinking. In general, folks tend to blink more frequently. This happens when they are in a situation where repeated eye touching would be inappropriate. A politician giving a speech, or testifying under oath, for example. 

 

 

When people cross their legs and their arms, it can be taken as a sign of being defensive. Especially if they are standing, with their legs cross near the ankle, and their arms crossed in front of them. This can be an indication of lying, or it could mean that they find what they are saying extremely distasteful. You’ll need to take the context into consideration. 

 

 

When people lie, it is very hard to look somebody else in the eye and keep a straight face, so to speak. In this instance, a straight face is all their facial muscles relaxed, with no tension or twitching. The best liars can maintain eye contact while speaking right up to the point of lying, and then even they will have to look away briefly. 

 

 

This where you calibrate on an individual basis. This can be done with employees, spouses, children, anybody who you are in a relationship with that you fear may lie in the future. Just pay keen focus on any particular facial movements or body language they show when you are certain they are lying. 

 

Naturally, this mean that you let a few lies slide, but this is a small price to pay for being able to read them like a book. Tells are unconscious body movements and facial tics that card players exhibit when they are bluffing. Once you have three or four "tells" collected, they’ll never be able to lie to you again without you knowing it.