People like confident individuals, even if their other qualities are less attractive. Developing confidence is a balancing act as you don't want to be arrogant, but you also don't want to come across as timid or scared.

Exercising regularly, dressing in clothes that make you feel good, and talking about the things you understand well can help you build and maintain confidence.

Control the flow of conversation and make others feel comfortable:

• Think of things you would and wouldn’t like to talk about and use that as an initial guide.
• Be nice, as opposed to trying to sound brilliant.
• Tell stories.
• Ask questions.
• Know how to get people on the same level.
• Use humor as a tool. Keep jokes you are unsure of to yourself.
• Remember that the way something said is more important than what is said. 

Proper eye contact can express that you're invested, listening and accepting of the other, while looking down or constantly shifting your gaze shows lack of interest and focus. Too much or too little eye contact can be off-putting, experiment to find the right amount.

• Don’t stand stiff. It makes you look less interesting.
• Smile to seem more approachable and likable.
• People enjoy being around those who are expressive and use appropriately responsive gestures.
• Nodding shows that you're listening, but nodding too much gives the impression you’re faking interest.
• If you lose awareness of your mannerisms, stop and assess what your body is doing to become more self-aware and then adjust accordingly.

Match the other person's physical mannerisms and energy level, and you'll notice how well they'll respond to it. You don't need to agree with what they say or do, the mirroring itself can increase your likability.

You can also mirror the qualities that you find likable in others. You don't need to copy them, but learn their secrets, try them on and adapt them until they fit you.