Just imagine, if the organization you work for decides to replace you with someone who can do your job far better than you, what is that they would look for in the person? Would they look for someone who can put in more work hours, or someone who can make quick decisions or someone with industrial knowledge? Or would they look for someone who is more passionate about the job or someone with a vision for the future, or someone who can come up with revolutionary ideas or someone who is more flexible with change.
Answer to this question is the gap between good work you are currently doing and remarkable work, you can do. Just try answering the question and you will be amazed with the things you can actually do.