I did John Donne for my English Literature poetry module and had to learn 'The Flea' and 'Sunne Rising' amongst about 10 others. I actually quite enjoyed that module. You're on a different exam board as me, but I can pretty much guarantee they'll be looking for the same kinds of things. Just talk about the travel, medicine, religion astronomy, literature etc of the time - Anything that was new and exciting at that point is bound to score you marks, as well as talking about love and death etc. Wit is important - mention the use of wit in language, especially imagery.
Good luck. I got 95% on this and actually was near the bottom of my class marks wise haha - the whole set did very well, and so it can't have been a particularly tough one. =]]