Step 1-Realize that your life is about to be turned upside down for the duration of the on coming tantrum. You may as well embrace it. It just has to run its course, you can't control everything.
Step 2- Go to your kitchen and pour your self a glass of wine, this could be a bumpy journey
Step 3- Ensure your kid isn't going to get hurt, hurt someone else, or break something. You can't always remove your kid from the situation, but you can remove the situation from him. Give him or her somewhere safe to let their emotions outs.
Step 4- Take a sip of wine.
Step 5- Ignore them ( and by ignore I mean make your kid think you're ignoring them when you're actually watching them like a hawk- see step 3)
Step 6- Drink more wine.
Step 7-Be consistent and stand your ground. If they are throwing a tantrum because you said no TV, then don't cave and give it to them just to make the tantrum stop. Trust me I know its tempting but all that teaches them is if I scream long enough I'll get my way because mommy is a pushover.
Step 8- Drink more wine, and refill as necessary
Step 9- Be funny. I don't know any toddler that can stay mad long when your making silly faces or sounds.
Step 10- When the storm has passed pick your kiddo up, give them a big hug, and carry on with your day. Remember that with a little patience ( and wine) you can get through anything.