1) Look at old games - take a look at the top players, study some of their past games - a lot of time, people will "fall" into the same trap over and over.
2) Whenever it is your turn - look at where the other person put their piece. STUDY IT, and ask youself "Why did they put that there" - most of the time you can find what they are planning, and go from there.
3) Use your in-game notes to yourself - If I have a plan, or something - I always list it in the notes for myself to read - like "watch out for B3" - or a step by step plan like "(me B3)(him B4) (me E3) - win 2 ways".