Avoid bullies and teases

Keep distance from from people who are willing to crual if it makes for a good punch line, someone who will just have no sense of what's appropriate, and someone who don't care whom they hurt. 

Know that one bad moment doesn't mean a bad day

Especially when you spend a lot of time inside your own head, as shy people tend to do it is easily distort experience, to think that your Shyness ruined an entire event 

Stop selp sabotwging

Sometimes we really are our own worst enemy. Don't allow your inner critics to put you down. Instead, analyze the power of that voice so you can defeat it. 

Know your strength 

Make a list of all your positive qualities and enlist a friend or anyone to help if you need to and read or recite it when you are feeling insecure. Let it remind you how you have to offer.