How can I stop my 2 year old from having temper tantrums in public?

My son will throw temper tantrums in public such as in store, etc. He will throw himself on the floor and kick and cry and won't hardly let me get him up. I put him in a cart in places that have them but some don't and even if they do there are lots of times he will kick so much that I can't get him in a cart. It is so frustrating and embarrassing. Any suggestions on how to deal with this behavior?

its terrible twos we all have to go through with it. my daughter didnt go through it but she is 5 and she acts like a teenager lol