great question. i was an english major during my university years, and this skill was the epitome of everything i did.

critical thinking skills always stem from when you question quite literally, everything.

with the simplest question being:

"why?"

when you ask yourself this, it makes your brain infer, assume, and predict what the answer you're seeking could be. it also creates a sort of domino effect for more questions to be asked within the topic you're focusing on.

also, write whatever answers down that come to your mind that way you can reference back to them as you start to formulate a greater in depth discussion!

hope this helps :)