Hi
I find that writing to a standard formula seems to work for me. Its taken a bit of work and sometimes need twisted a bit depending on the essay question
Introduction: pick out key words and use them, state name of poem and author - is good if you can provide back ground info eg year written. If question asks you to address something specifically then write a few sentences on it here, if you get what i mean. Then say what your paragraphs are going to be about eg: symbolism, characterisation and setting, write about them in this order!
Para 2: make point its symbolism para and say the items/things your going to write about eg (I know this is from Lord of the Flies is just of top of head) beast, conch and Piggy's glasses and address them in that order and make a summary sentence at the end of each one and try to keep using words from question as keeps essay focused
Para 3: do same for characterisation
Para 4: State why setting is important and that if it wasnt for particular setting/location then theme/issue that question is asking wouldnt of come to light. Keep with the summary sentences for each point
Conclusion: Look back at conclusion and point out that through poets use of: symbolism, characterisation and setting the issue/theme is explored/makes an impact on you etc
I know this is very basic but would be alot of typing to type up my whole structure.
I am getting 21 - 23 and have had a 19 but if anyone can tell me how to get to the 25's then i'd be very grateful.