To count one"s chickens before they are hatched. To make a mountain out of a molehill.小题大做 Too many cooks spoil tbe broth.人多手脚乱 Well begun is half done.事半功倍 When you are in Rome， do as the Romans do.入乡随俗 Where there is life, there is hope.留得青山在，不怕没材烧。