T.S.
Some thing that works well for us is to go over the plan prior to entering and keep it simple and clear. Ex. We are going into toys r us, We are going to buy one toy for Jonnys birthday, there will be no whining or we will leave, if you see anything you want we can make a list for Santa. As far as the library situation goes, make sure your expectations are realistic. That may varey for different children. Also I don't know if the time out was nessasary bc it was so late after the crime. I think leaving might have been enough. I read an awesome book on disipline that was a quick read for busy moms called the NO Cry Disiple Solution by Elizabeth Pantley. Great ideas in there for different situations. good luck, hope this helps.