It is not enough to eat sweet things, we have to be sweet ourselves.

As we head into Rosh Hashana we have to make changes in our lives.  We have to daven differently and  treat our friends differently.  We have to make concrete changes.  Each change that we make, makes a major difference.  We have to prepare ourselves to be on a level of Malchus on Rosh Hashana.

from a Shiur by Rabbi Efraim Wachsman, Reflections of Elul,part one