To write a good literary response, you will need to have a thesis. This is the key. Also keep in mind that a thesis is debatable. Something that is not debatable is not a thesis; it is a fact.
After you come up with a thesis, you will need to defend it by looking at the text that you are studying. In other words, show why you think your thesis is strong. Give your reasons. The stronger your logic is, the better your literary response will be. In connection to this, it would be good to employ quotes from the work and secondary sources from recognized scholars. The more aware you are of what others have said also lends credence to your response.
In conclusion, if you see your goal as to persuade your reader, you will be on the right track.