I need to make position 0,2 (top-right corner) my highest priority for two critical reasons:

1. Defensive necessity: My opponent has placed O's at positions 0,0 and 0,1, creating an immediate threat to win on the top row. I must block position 0,2 to prevent their victory.

2. Winning opportunity: I already have X's at positions 1,1 (center) and 2,2 (bottom-right). By placing my X at 0,2, I'll complete a diagonal line from top-right to bottom-left, securing my win.

This move is optimal as it both blocks my opponent's winning move and creates my own winning position in a single turn.