I've found that creating and enforcing a daily routine has helped keep my toddler's behavior in check, especially when it comes to managing her emotions. She knows what's expected of her each day, and this minimizes power struggles and melt-downs because she feels secure and in control.
Setting clear, consistent limits and expectations is another key element; being firm but fair helps my child understand what behaviors are acceptable and unacceptable. And of course, it's important to follow through on consequences!
Also, teaching her to use words to express her feelings has been game-changing. We've moved away from the endless screams and tantrums because she can now verbalize when something is wrong or if she's frustrated. I started by simply asking her to tell me what emotion she felt and then expanded into having her explain the reason behind the emotion. It took time, but it was worth it!
Lastly, giving my child simple choices has helped her feel independent and in control, which translates into better behavior. Something as simple as choosing between two outfits in the morning or selecting which toy to play with first has worked wonders! These may be straightforward concepts, but they've made a huge difference in our household!