I see you're wearing your coat. Change the environment to suit the child. Instead of taking the child out for a walk on the sidewalk where the excitement of a busy street may be tempting, go to the park, the woods or an open field where he can roam with you, away from danger. Don't visit china shops or keep treasured items where small children can see them. Putting the no-no's away for a few years will save many tears, screams and treasures.
Children are more likely to have a tantrum if they are ill, tired or hungry.
If your child is prone to regular tantrums, observe when and how often these occur. Teach children, even very young children, how to negotiate, problem solve and use words instead of actions to get what they want. A child may trade a toy with another child, learn to choose another toy while she waits for a turn or ask the other child for a turn when she is finished with the toy. Help all children learn that others have needs too, and everyone has to wait sometimes. Learning not to be a victim and not to bully others are important lessons.