You cannot force a win against perfect play
The best possible result is a draw
If you go first, take the center
If the center is taken, take a corner
If the opponent takes center, take a corner
Always block any immediate threat
Create a fork when possible
Prevent your opponent from creating a fork
Prefer moves that give you multiple threats
Play perfectly and wait for the opponent to make a mistake
If the opponent makes a mistake, take the winning line immediately