First, you need to take three points in Survival of the Fittest. This talent is what makes you reach your soft defense cap.
Talent Calculator - World of Warcraft - Bear Druid: Here is an example of a heroic bear druid build. It can vary, but it picks up tools for you to use that is usually not given by anyone else.
Secondly, get rid of that resilience. It does nothing for you now, with 3 points in SotF.
Lastly, please go and read these three threads. They will teach you more than can what be explained in one forum post.
Feral tank pre-raid gear - Elitist Jerks
Feral enchants - Elitist Jerks
Druid Gem Compilation - Elitist Jerks
There is always something new to learn about tanking.