Some years ago I played against a very strong opponent and came into difficulties right from the beginning. A surprising pawn sac became the turning point of the game …

http://blog.chess.com/mauerblume/a-pawn-offer-at-the-right-moment

Here you can read the whole story and see the game till the end. It came to a strong  counter play and a big showdown!

http://blog.chess.com/mauerblume/my-best-win–so-far

Another example how strong center pawns and heavy pieces in the f-file can work together well

http://blog.chess.com/mauerblume/a-strong-pawn-center-and-powerplay-in-the-f-file

In the following game you can see how a strong center pawns and power play in the f-file went well together

http://blog.chess.com/view/my-best-loss

In the following famous game we can see how former world champion Euwe came under a heavy king side attack. But just in a high-noon situation he decided to sacrifice a rook (deflection of the queen)

and to go for a counter attack on the white-colored squares

http://blog.chess.com/mauerblume/cool-counterplay-a-la-euwe

This is perhaps the most important part of this website

A Pawn Sac  stops opponent`s activity:

http://www.chess.com/emboard.html?id=765459

The whole game you can see here

http://blog.chess.com/mauerblume/a-pawn-offer-at-the-right-moment

Here is an interesting example how one can use the weapon of Queen exchange to activate your pieces

http://blog.chess.com/mauerblume/the-exchange-of-queens-with-decisive-advantage