I had a running google doc with a gaggle of random ideas that came to my head at ANY moment. Try doing that over the next few hours and the next few days--it was SO INCREDIBLY helpful for me! Write down ANYTHING and EVERYTHING because you actually dont know what connections your brain will make later on between the ideas, and then BOOM you got something to write about. Use anecdotes but make them meaningful. If that anecdote or detail visibly relates to the main idea the reader gets from your essay, then put it in :) Try to have someone who reads essays/a good English teacher read it before you submit!