Where's the supernanny when you need her?

I would put her poor behaviour down to staying up late for New Years last night, but we didn't go anywhere, so Jesse was in bed her usual seven pm. So, why, oh WHY she would be throwing hissy fits all day today is simply beyond me. What started out as a lovely outing to the sis-in-law up on the hill, quickly turned into a day of alternating between screaming fits of anger, heartsore sniffles, temper tantrums, throwing her toys accross the room or AT people, more tears and more tantrums.
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And not only from me. Jesse too!
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OK, I am kidding. But seriously, if something doesn't change, I'm going to join in on the madness soon.
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I honestly don't know WHAT to do about correcting Jesse's tantrums anymore. I am tired tired tired of it! Sick and tired of being sick and tired of trying to control the tantrums. I've read the books, implemented plans for dealing with misbehaviour, done my homework, thrown my hands in the air, pretended she was someone else's kid (I'm so bad!), spanked (please no judgement!) , distracted her from her behaviour, gone down to her eyelevel and used my "I'm serious now" voice, I've said no, followed through on "If you do that, then I will have to do this" threats, and am STILL completely out of my depth!
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Someone please tell me that The Terrible Two's sometimes come early! And then leaves early too!
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This little girlie might be pint-sized, but she is strong willed and very passionate about what she wants... And apparently she is WINNING this battle of wits against her exasperated parents.
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Lord have mercy!
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My sister-in-law kindly loaned me a book to read by Jo Frost of Supernanny fame. I have already read lots of it in the hopes of finding a solution to the sullenness silliness... Let's hope we make some progress this year. And before I am completely grey. My hair-dying budget cannot keep up with the number of new grey hairs that are appearing.