Is your eclipse workspace seems to be different that it used to be ? you made a mess of where the Package Explorer or Console window or other sections and want to get back to default layout, you can do it by going to,
Menu : Window -> Reset Perspective
Note : This will reset the layout of Eclipse for the Current Perspective that you are working with say Java, PHP or Web
Once you reset, all sections will be back to their original place as they were before!