MouseFeed is the best eclipse plugin that I have tested/used in a while. The plugin will make you learn the eclipse keyboard shortcuts and thus be quicker when using Eclipse. If you are using the mouse or the menu bar to select an action, and there is a shortcut for the action, the shortcut will be displayed in a big message box.
The message box is not too big, but enough annoying so in order to never see it you are forced to learn the shortcuts. So you learn even if you don't want to!