Hi, I ve got two children that behave very similar to this and the only thing that I have found that has even slightly garnered results is for me and my husband is to be consistant so we reward good behaviour and I dont mean every little thing that is classified as good behaviour I mean things that they do that requires some thought and effort, you'll  know when they are making an effort.  And the main thing is if I have said that naughty behaviour is going to result in something whether its a smack, or they dont get a treat or they have to go to their rooms etc obviously that depends on their age:) then I really endeavour to follow through because I ve found that they only push their limits harder if I dont.  Even toddlers can tell the difference between good or bad behaviour its just a matter of finding a way to communicate it to them so that they understand.  Good Luck

I think now is a good time to start. You know when she knows. If you let it continue it's only going to get worse. I feel for you. My 2-year-old has just recently begun to really challenge us, but my 4-year-old started at 18 months. He was soooooo hard-headed, there were so many times I would be the one ending up in tears. LOL. Well, at leas I can laugh about it now. At the time I thought it was never going to end.

I've always said that 18 months to  2 1/2 years are the most challenging, this was certainly the case with my now 3 1/2 year old son. I remember taking him to the pediatrician for a flu shot at 18 months and in the middle of the waiting roomw as a huge christmas tree. On the tree was a sign, "please do not touch". This in the middle of the pediatrician's office!!!! I had such a tough time telling my son not to go there and touch. It was very frustrating!

At this age, it is normal for them to explore their surrounding and test their boundaries. This is something that is great to encourage because it will develop their independence and self confidence. In my house, I took away things that are dangerous for him. So that I didn't need to say "no!" a million times a day. I then decided on a time-out. But only reserved it for very bad behavior like hitting, and throwing toys at me. Having a very defined set of bevior for a time-out made it easier for me to be consistent and to be successful.

Perhaps a variation of this would work for you? Define set things that are absolutely not OK to touch/explore and then define your punishment.  Good luck

don't be afraid to do naughty spot when you are out.  The only thing other shoppers are going to think is that you are in control of the situation. (we've all seen the out of control child, having a tanty in the middle of the supermarket, with mum embarassed by what everyone else might think).  I often threaten my children with the naughty spot when we are out.  I have never had to do it, because the threat alone works.  Use the same rules for when you are out.