I use all time counter attack.... mmmhh... the posession depends of 2 facts... 1 if he see the match, 2- maybe he will have something like the USA army but with full of Coreans, Chinese players... or Bulgarian addicted guys... If you go alone to see the match and he have 10 friends, possesion will be +15 for his team. That simple...

But, I've to say that posesion is not all, you don't have to worry to have +5 or -5 of possesion... try to have all players in condition, good morale, and if you have a player that, maybe is not the better of quality, but, he scores usually, use it.
For example I have a player Robben, of 27 years, train slow, an he is 4 stars when at now my team is full of 7 star players, but... when I put this player on the field in the 2nd time, he usually scores or assists. think in it