Pre-teach your child what behavior is expected before a tantrum hits. Learn the triggers and address them with planning. During a meltdown, try to:
1. Look at the child.
2. Talk to them calmly and softly about what they are doing.
3. Move them to a quieter place, if possible.
4. Help them to regroup and redirect their focus (perhaps sing the ABCs).
5. When the tantrum stops, reinforce with praise and pick up where you left off.