What should a parent do to a toddler who always screams or cries if he doesnt get what he wants?

1)try to calm him down. n let him understand the situation. 2)dont try to promise him anything in future if u r really not try to keep the promise. that makes him throw a tantrum when he cant get what he want. for example : " we will buy toys next time we go to A mart. " n the time u go to A mart, the kids will remember guys. huhu.. 3) teach him a lesson. if he didnt wanna stop crying, no more televisyen session for him or snack for the day. btw, it depends on how old he is. hehe.. goodluck mommy..