I read an article from a mother who wrote in response to an article about the terrible two etc. She said she used to have trouble getting her child dressed when they were going out. She said at times she did feel like giving the child a good smack because she had enough.
She then decided to offer a choice to the child as to what clothing they wanted to wear. This came about after the child wanted something that was in the wash. The lady said she told the child that what they wanted to wear was in the wash however, she had two other items of clothing she wanted the child to choose instead.
The child made the choice and she said it put an end to the issue. She then applied reasoning to the child instead of smacking because she felt it had a negative impact on the child anyway and was only good for changing behavior in the short term.