You can find many techniques on google with similar approach. Here is the essence of those which works most.
Everyone has insecurities when doing something new. Here are three ways to build strength and be self-confident.
You can find your confidence even in scenarios where you have little or no experience. Here are 5 techniques we combine to be confident in new situations.
1. Talk one notch louder than the other person.
Thats a simple and an effective psychological technique to become confident. When you are talking louder your sub-conscious and unconscious mind is recording your attitude towards the situation(you are sending the signal that I'm confident whether you are with me or not) and as you make it as a habit you will feel more self control and confident. But don't be dominating.
2. Look the part.
Or, as the saying goes, "fake it 'til you make it." If you know that you look like a confident, capable person, eventually you'll start to feel it, too. Try these tricks:
• Take care of yourself. Devote a little time each day to personal hygiene and making sure you're presenting yourself well. Shower daily, brush and floss your teeth, and groom your skin and hair.
• Dress for confidence. You don't have to buy a whole new wardrobe to feel better in your clothes. Instead, simply try to wear something clean every day. Take it a step further by doing laundry often enough that you feel like you have a choice about what to wear in the morning, instead of settling for whatever isn't dirty.
• Perfect your posture. How you carry yourself communicates a lot to other people, so make sure you're telling them that you're confident and in-charge. Keep your shoulders back, your spine straight, and your chin high. Walk with purpose instead of dragging your feet, and sit up straight.
• Smile and make eye contact. It's a subtle change, but it can work wonders on how other people perceive you. Don't be afraid to meet the gaze of someone else, and keep your grin in easy reach — both of these things can disarm most social situations and make everyone feel more comfortable.
3. Avoid perfectionism:
Perfectionism paralyzes you and keeps you from accomplishing your goals.
4. Talk to Everyone:
One of the best ways to overcome shyness is to make it a habit of speaking to everyone.
This sounds like a bit of a catch-22 situation, since you need to have confidence to be able to speak to people, and you need to speak to people to build confidence. The trick is to start small, for example just start saying “hello” or “good morning” to one person every day.
Then when you start feeling more comfortable with this, start speaking to two people every day, and increase the length of your conversations.
5. Practice and Be Persistent
The third and final tip that you need for overcoming shyness is to practice endlessly and never give up. Theory and education will only show you the path to becoming confident, but you still need to actually walk it to gain the full benefits.
The more you practice, the better you’ll become.