what about in public?

Ok I have a 3yr old who is tender natured and basicly upbeat until things aren't going the way she thinks they should, i.e sitting when its appropriate, whenever this comes up the bottom drops out its is blood curdling screaming and body throwing.  Now befor you ask no this is not my first child I did a fine job with my first maybe that is why I am so dumbfounded. Ok so I know all of it stick to your guns I'm the boss ignore or give them a safe place to throw a fit but what happens when I am in the store, bank, any public place whare I am unable to walk away imediatly and  insisting on standing in one place or being held or sitting turns into a tyrade you would expect from a child who was on fire what then??????? My ped sais finish what I am doing but I don't think its right to disrupt everyone else like in a bank or an open house for my older daughters school who by the way my older daughter is getting the short end of things because of this i am not able to be more involved my husband works and we dont live near family or close friends so those arent options I neeed a real solution I real way to handle the fit without giving in or making the genral public wish I didnt leave the house. Please if anyone has anything they have tried I would live to hear it.  Thanks Angie

[sweetmamajen]

I'm dealing with this a bit.
I have recently been threatening to take away beloved belongings if they can't listen and behave while we are out (if they act up while we are out I remind them). Rewards are good, such as buying a little treat at your last stop of the day, or a trip to the park on the way home if she is good. I also lay down the rules before every time we go out. Reminders of the rules definitely helps. Just be patient and persistent. Remember to praise her for being good as much as you can and try to avoid telling her all the negatives she's doing.