blurtinganswers

I am too old to be blurting out the answers. I did it in grade school. now i am in a higher education environment and still like to be the one who answers first. I like to give my input but it is not always right. I keep getting mad at myself for not just keeping quiet and only answer when asked. I really need to stop. I KNOW that it makes you look insecure as well.
In general, I talk too much (although there are a bunch of people I know who are worse) and I really want to be a bit more reserved or at least make fewer comments. I believe I just need to think more before I speak.