Don't look at it from the point of view of studying texts, rather look at it from the perspective of studying your elective (ie postmodernism). You use the texts (+ related) to show your understanding of how the texts are influenced by their context, the subversion of literary 'qualities' and how they reflect values of the author or of the society.
Focus on the actual values of postmodernism - you should know millions of them off by heart
. Depending on the question you're asked (if it's creative it's easy, if it's an essay it's a bit more complicated, if it's a speech or something to people in the 21st century it's just BORING) you can relate to the characters as 'real' people (eg. writing a dialogue between two characters from two different texts illustrating your understanding of postmodernism allows you to 'take on' the character of Sarah) or you can write about how the texts have influenced YOUR way of thinking (the invasive narrator in FLW for instance - use him as an example and give evidence as per usual essays).
If you ever forget what to write about because the topic is so vast, keep checking the syllabus. Write it down somewhere and remind yourself that THAT is what you're focussing on. Like Telling The Truth, it's not about the texts you're actually studying but the CONCEPTS behind those texts - the context of the author and responder, and the values inherent in the text which are derived from the author's society or culture.