Chess Rating

This link shows how my rating has changed according to games lost or won at Chessworld.

As you can see, I seem to be holding steady at around 1100, therefore I have decided it is time to start reading up on how to improve my tactics. The first book I have purchased is, "Rapid Chess Improvement" by Michael de la Maza, which discusses tactical thinking and 'Chess Vision' as the foundation upon which positional knowledge should be built, rather than the other way around.