On a yahrtzeit, there's a custom to study chapters of Mishnayos that the first letter of the chapters spells the name of the niftar. For example, if the niftar's name was שלום, the chapters studied could be Brachos ch.7, which begins with the letter 'ש (שאכלו שלשה), then Maasar Sheini ch.2, which begins with a 'ל (יאמר לא), then D'may ch.2, which begins with a 'ו (דברים ואלו), and then Brachos ch.1, which begins with a ם (קורין מאימתי). The Beis Avraham zt'l said that very few chapters of Mishnayos begin with a 'צ, and the two that do begin with a 'צ are in seder Taharos (Parah ch.9 and 12). This hints that to be a tzaddik ('צ), one needs to toil on Taharos, purity. He must purify his thoughts and deeds at all times.
It is known that the Chofetz Chaim zt'l would travel from city to city to sell his sefarim. In those days, people living in cities distant from Radin often had never heard of the Chofetz Chaim, and they didn't know to honor him accordingly. Therefore, he didn't always have the best accommodations. Once, someone invited him to his home for the Shabbos meals. The Chofetz Chaim asked him who else would be eating there. The man who invited him was shocked when he heard this question. He thought to himself, "You should be happy that I invited you. Why are you checking who will be there?" The Chofetz Chaim told him, "My name is Yisrael Meir from Radin. I wrote the Mishnah Berurah and other sefarim. Therefore, I asked who else would be at the meal because I will only eat with people who are ehrlich and G-d fearing."
