Accountability at work means being held accountable for your actions, not pointing the finger at others when something goes wrong. If something needs to be done, whether it is your responsibility or not, it's important to not wait for direction to take action. Take the initiative and as Nike says "Just Do It!" Leaders need specific Interpersonal Leadership Skills to help create a culture that encourages and engaged accountable workforce.
You may have identified aspect of your performance that you would like to improve. Before you decide what to do about them, you should analyze why the unwanted performance trends exist. The major reasons for any performance problem are: