When I took Paper 2, I found the easiest way of learning lines of poetry was to initially assign the poem to a few themes (for example: 'coming of age'), or think of a few keywords that could be used to describe the content of the poem. From there, select a few areas of the poem where these themes are most prominent, and choose around 3 or 4 quotes that represent each theme in the poem in the best way. You should try to have quotes from around 12-17 poems, but it depends on the number of quotes you have from each poem and how long each poem is, but generally speaking the more quotes you have to back up your arguments in an essay, the better. Once you select your quotes, I found that repetition is key for committing quotes to memory. Saying the quotes (or even entire poem if it was short) to myself was a useful way to remember them, as I am an auditory learner, but others find writing down quotes multiple times to be more practical for their learning type. Another good method to use is to select a word of interest in the quote that you can use as a memory jog of sorts, or to associate your quote with something like a song lyric or a name to help you remember it.