I'm terrible with techniques as well but I think the main idea at English is you need to focus on ideas first. As soon as you have a really clear and strong idea, the techniques and analysis come naturally. Just constantly ask yourself - what is the text talking about (in relation to the module you're studying)? And maybe brainstorm about it first before you approach textual analysis. If you have no idea what your ideas are, how are you expected to produce good textual analysis?
My teacher told me a really good way of approaching textual analysis is to look at:
- Context (when was the text produced? Does the author's time have any impact on their composition - i.e. values, dominant discourse, etc.?
- Plot (what is happening in the text)
- Themes (what are some major themes in the text - these often influence the ideas explored, i.e. in Frankenstein, nature is an influential theme and is influenced by Shelley's contextual concerns over how ambition disrupted our relationship with nature)
- Key scenes (what are some really important scenes you need to analyse?)
- Specific techniques
Essentially you're looking at an inverted pyramid kind of thing to analyse texts - go from the biggest areas down to the smallest. Be sure to pick your techniques really well (there's heaps of online resources about techniques, so don't worry about not knowing them too well. Just know some really good ones like symbolism - haha my personal fallback, personification, allusion/intertextuality, etc.) because poor evidence can never really support a great idea.
Also know techniques for a specific text - i.e. visual techniques for visual texts, film techniques for films, etc. You always want to be using specific meta-language for specific texts because it shows markers that you know your stuff and you got this!
Also talk to your teacher about where you can improve on - it may not be a technical issue, but rather a conceptual one. I found that out literally a week before my trials and I'm pretty sure it saved my essay LOL