How do you not be shy?

To not be shy is trying to change your mindset in the way you view things.
Being shy probably means you don't have the skills to communicate effectively. Try first looking to see why you are shy. Once you find out why - this could be due to a childhood experience, or an embarassing moment - you can then look to find the solution to overcoming it.
Don't let someone demorialise you. Try different techniques to overcome shyness. The following are 3 quick tips to overcome shyness.
1. Smile. You will become more approachable
2. Prepare a list of questions to ask people.
3. Dress Confidently.
Try these tips and see how you go.