Ok seems like you are stuck on techniques but I'm sure you are spotting out techniques without really knowing it
This is how you know and the things to ask yourself:
-phrases that STAND OUT and you get a hunch
-phrases where they are never used in real life, but only to emphasise something
-do they (words or phrases) make you imagine, visualise, hear, etc
-are the phrases not to be taken seriously?
-they are not normal?
-do they have an interesting component that makes that phrase unique?
so now you have your phrases/ words that seem different = may have multiple techniques
next is to familiarise yourself with literary techniques out there by checking:
Absolutezero's The Complete Literary Technique List and
http://literary-devices.com/