Modesty — Tzniut — צְנִיעוּת
Distance yourself from all that is ugly and unseemly,
from lust and from anything which lead people to be suspicious of you,
and you will find favor in the eyes of God and man.
Cheshbon ha-Nefesh (“Accounting of the Soul”) is a step by step approach to improving one's characher traits. It was written by Rabbi Menachem Mendel of Satanov. It was published in 1845 with the encouragement of Rabbi Yisroel Salanter. The book is available from Feldheim Publishers.