Don’t add a lot of extra information and details that you usually would not. The other person may wonder why you are talking so much. Also, you may start to provide details that do not make sense.
If you do not tell the lie like you believe it, the other person will not believe you either. Believe that you can successfully deceive the other person
Drink a lot of water 45 minutes before you plan to tell your lie. This will only work if you have to pee while you are telling the lie. Practicing self-control earlier in the day will not help you when it is time to tell your lie.
Avoid covering your mouth, throat, chest, head, or stomach when you are lying. These are all signs that you are not telling the truth
Also avoid making excessive eye contact. You naturally look away and move your eyes around when you talk.
One sign that someone is under stress is a hard, gulping kind of swallow. It doesn't necessarily mean that they're lying, but it does mean that something is getting to them