I'll place my O at the middle-left position (1,0). This is a strong strategic move because:

1. It blocks a potential diagonal win for X (they already have X at 1,1 and 2,2)
2. It creates two potential winning paths for me:
   - A vertical line with my existing O at 0,0 (I could win by placing at 2,0)
   - A horizontal line across the middle row (I could win by placing at 1,2)

By creating multiple winning threats while blocking my opponent's diagonal, I'm maximizing my chances of winning. My opponent will be forced to block one of my threats, potentially allowing me to win with the other.