The Musar Movement of Reb Israel Salanter I think can be divided into different areas of emphasis: Fear of God, Trust in God, good character traits e.g  speaking the truth.
Each disciple came away from Reb Israel with something different.

But I think the track and idea of trying to find a limited numbers of things to emphasize is a better that just "keep Torah" since people have only a limited number of rules they keep in mind on a daily basis. So that set of rules has to be the set that contains the whole Torah in potential.