Tonight is the night that we will complete the counting of the Omer. But it is not enough to count the Omer. You have to make the Omer count! The period between Peisach and Shavuot is a time that one should prepare himself to receive the Torah.
The Torah that we learn, the Mitzvot that we perform, and the acts of loving kindness that we do are like glue that help us to cling to the Creator. If you want to glue two surfaces together, you have to make sure that they are clean before you apply the glue. Dirt will prevent the glue from sticking. Similarly, if we want to cling to God, we have to clean ourselves from transgression.
Humility is also a precondtion to receive the Torah. The Torah is compared to water. Just like water always flows to lower places, the Torah is acquired only by those who are humble.
Shabbat Shalom and Chag Sameach!