No Mnemonics but what i can say might be of help. Try to first get the gist of the topic, this will enhance understanding, further read the topic in an easy read fashion taking bullet point notes on small cards. as you go about your daily activities peep to memorize the card and before you know it you will be fluent in the subject area.
also create a mind map of the syllabus that connects all the topics together and include your bullet points into the map. this improves improved comprehension and high quality answers.