Choose a topic that intrigues, inspires or interests you.
Select five to 10 keywords and/or concepts that come to mind when you think about the topic.
Write one or two paragraphs about each keyword and/or concept, without worrying about how all the keywords and paragraphs relate to each other.
Look at all the paragraphs you have and determine if you have enough material for the desired length of your essay. If your essay is too short, write out a few more keywords and/or concepts and write one or two paragraphs for those as well.
Edit each paragraph as a stand-alone, as if each paragraph were a mini essay. Revise for punctuation and grammar, as well as tone and style.
Read all the paragraphs when you've finished revising and decide if you'd like to order them for the most logical flow of ideas, or if you'd like to order them according to tone, or subject matter, or even if you'd like to order them to be as disconnected as possible.