Well, you can start by learning from the examples in social stories. Notice how the characters in those stories communicate their feelings in a proper way. Try to imitate them. When you're in a situation that might make you want to scream, think about the words you could use. It could be as simple as saying 'I'm frustrated' instead of screaming. And always remind yourself that using words is a more effective and civilized way to interact with others.
One way to use 'I can use my words' in social stories is by creating scenarios. Let's say you're writing a story about a child at school. 'I can use my words to ask for help. If I don't understand the math problem, I can say to the teacher, 'I'm having trouble with this problem. Can you help me?' It emphasizes the positive behavior of using words instead of getting frustrated or acting out.
Well, with 2 year old social stories, it's important to make them relatable. Read the story with enthusiasm, using different voices for different characters. After that, discuss the story with your child. Ask simple questions like 'What did the little boy do?' This engages your child and helps them internalize the social message. Also, repeat the stories often as repetition is key for 2 - year - olds to learn.
One way is to use them at the right moments. For example, start a story with an 'eerie' description of the setting to immediately set the mood. If you want to introduce a character, describe them as 'sinister' to make the reader wary of them.