Tonight (12 Adar) is the yartzeit of Shmuel Horowits. He was a close friend of Saba's and helped to publish a lot of Breslov seforim. Part of his autobiography, Yemey Shmuel, has been translated into english and can be read on nanach.org
Tomorow (13 Adar) is the yartzeit of Reb Nachman of Tcherin. He was one of Reb Noson's main students and a big Tzadik. He compiled a number of Breslov seforim, including Otzor Hayirah. He also wrote Parparot Lechochmah, a commentary on Likutei Moharan.
We should light candles for the aliyot of their neshamos, say and sing Na Nach, and read from their holy books which are all based on the teachings of Rebbe Na Nach Nachma Nachman MeUman.