"Sometimes your body language tells people everything they need to know before you ever open your mouth," writes Dean Bokhari.
Experts have highlighted specific body-language techniques that can make you more likable. For example, don't break eye contact with your conversation partner, even after they've finished speaking. And make sure not to fidget or touch your face too much, which can give the impression that you're lying or anxious.
You can also read other people's body language to help figure out what they're thinking and feeling. For example, if they mirror your body language, the conversation is probably going well. If they smile but there are no crinkles around their eyes, they might be faking it.