For Politics the best advice I can give you is legitimately watch the news.
Keep your eye on Prime Minister's Questions, debates in the HOC, HOL
politics examiners like someone who can keep on the pulse
The same applies to your other coursework areas
The BBC news app is now your best friend.
For English Literature you need to destroy those books, break them down and highlight and annotate and then build them back up
Do past paper questions on the whole of the novel, on themes, on extracts
Now unfortunately I wouldn't know about classics but that's the best advice I can give you