Looking at the current board state, I already have an "O" in the top-left position (0,0). The opponent has an "X" in the center (1,1) and bottom-right (2,2), forming a diagonal. 

My best move is to play at position (1,0) - the left-middle position. This creates two potential winning paths for me:
1. It sets up a potential vertical win in the left column (positions 0,0 - 1,0 - 2,0)
2. It blocks the opponent from potentially creating a threat in that position

After this move, I'll have multiple ways to win on my next turn, which forces the opponent to defend in multiple places. Specifically, I'll be threatening to complete either the left vertical column or the middle horizontal row.