[header] How to get along with your younger sister [title] Stop and take a deep breath when you're feeling angry. [step] This will help you calm down and think about the situation. Are you angry at her, or just frustrated in general? Also, remember that whatever's making you angry may not be your sister's fault. 
[substeps] If your toddler-aged sister accidentally spilled her juice on you, try not to explode. Instead, take a deep breath and remember that she's still developing her motor skills.