My english teacher always told me to use the "DEER" method, which was incredibly useful throughout the year. Once you get the hang of it, you can switch it up a bit, so it doesn't seem so structured.
Basically "DEER" stands for Device, Example, Explanation, and Reader Response. You name the device in question, then you give an example of said device; after that you explain why that device was used (e.g. "the writer uses the harsh connotations of "..." to emphasise the severity of the situation"). You then mention what effect this has on the reader (e.g. "the reader is positioned to react immediately to the situation, before it has the chance to further inflate").
When I first started using this method, I'd try to have at least 2 DEER's per paragraph. My teacher also said to mention at least 2 shifts in tone, and at least 3 appeals