Write them down.  Get them on paper.  Map out the who, what, when, where, why, and how.  And be sure to write down what happens in each conceivable case in which expectations are not met.  You can’t guarantee results, but you can demand that your employees meet your expectations.  You won’t get far with them, however, if you haven’t effectively communicated your expectations to them.  This is why I counsel you to write them down.  If you can’t, then you haven’t really formed them, and if you haven’t formed then, then you sure as Monday can’t set them and enforce them.