Hi K.,
It takes a lot of work to teach children how to be civilized. I would have to say that what you are seeing is pretty typical toddler behavior (testing limits, low frustration, "I want what I want!") but, believe me, it won't just fade away without some kind of clear and consistent action plan carried out by both you and your husband. If you've ever seen a bratty kid or teenager throwing a screaming fit in the mall or in front of guests, or have had a boss that flies off the handle when things don't go his/her way or is feeling the least bit frustrated and overwhelmed, then you know what I'm talking about. They were once toddlers who were not taught limits and how to handle frustration. Anyway, here are things that you and your husband need to talk about and consider:
WHAT'S THE REASON AND PAYOFF FOR HER BEHAVIOR: Most likely, your daughter is behaving this way because she wants something (a toy, a favorite snack or drink, your attention) and she's learned (or testing out the concept) that by using her voice and throwing things, adults react and give her what she wants. This may be true in 99% of the cases but you may want to consider the timing of when the fits occur. Is she tired and due for a nap, feeling overwhelmed, or angry about something?
CONSEQUENCE: If you figure out that she throwing things because she wants something, then absolutely do not give her what she wants. There should be no positive pay off for her fit ever. In addition to that, you may want to consider (a) putting her in the naughty corner for 2 minutes, (b) clean up the mess that she made -- with your help, and (c) appologize to mommy, daddy, whoever, for what she had done. Also, if she throws something that belongs to her like a toy or a book, you may want to implement a rule that the object she threw is also put in time out for a specified period of time (put it in a place that is out of her reach but where she can clearly see it).
LAY A BIT OF GUILT ON HER: After she is out of the naughty corner but before she apologizes and cleans up her mess, explain to her why she was put in the naughty corner -- what rule she had broken -- and tell her that you feel sad when she behaves that way and, if the situation calls for it, that she could have hurt someone. Guilt is not a bad thing in all situations. If implemented constructively, it teaches us empathy and it can be used as an internal moral compass as we get older.
TEACH HER REPLACEMENT SKILLS: After she gets out of the naughty corner and makes amends for her behavior, do a little bit of role playing to teach her how to handle the situation better, whether it is turn taking, asking for something in her "big girl, calm happy voice," saying, "No, thank you," when she doesn't want something, or squeezing (hugging tightly) a stuffed animal or pushing the palms of her hands together when she is feeling frustrated or mad.
IF HER BEHAVIOR IS A RESULT OF HER BEING TIRED: Then it's really not fair not punish her but you can teach her to say, "I'm tired," and it would be good for you and your husband to learn recognize her non-verbal cues early on so that you won't be setting her up to have a meltdown.
CONSISTENCY IS KEY: Both you and your husband have to have the same rules and the same consequences each and every time. If you don't, you are sending the message to her that if she yells, screams and throws enough objects, she may eventually get what she wants. Believe me, she doesn't mind the noise and has infinitely more energy than you and your husband. She can go on forever and ever if she believes that there's a chance that she can get what she wants that way. You need to squash that hope.
Okay, I think that about covers everything. Good luck. I'm sure that once you have your discipline plan in place, it won't take long for your daughter to learn the rules.
L.