I've been practicing 3x3 Blind and I think I saw what's the meaning of Zeroing in this Sport
-Know: Know a advance method (CFOP, EG-1, EG-2, 3-Style, Yau, Lars and the rest)
-Do: Practice the most important in your cathegory and analize what happened if you did the full solve (F2L in 3x3 and...