The Rebbe writes that one should remove their mind from troubling matters, be careful with Mikvah immersion, and study Chasidus daily. He emphasizes memorizing Mishnayos and Tanya, guarding speech, maintaining health through charity rather than fasting, and living according to Chabad teachings.
https://www.torahrecordings.com/rebbe/igroskodesh/009/013/2916