Are you the one who has trouble memorizing a question or says that after almost 1 hour your haven't had it? 
Heres are tips for quicker memory enhancement, based on my own experience.

Tip 1: Read 3 times a Day- Read Morning, Afternoon and Night. 
Do this procedure if you don't have a regular day of classes to collect stock knowledge. (This is a weekend I suggested to do)

Tip 2: Space Repetition- This methods helps you to memorize quickly example: If you read books almost 30 minutes after you finish that you can take a break for an 1 hour and then you can back to reading again for 30 minutes do it 5 times daily to improve your memorizing.

Tip 3: Talk to yourself- It is hard, so when we read a sentence, we instantly forget that, when you speak to yourself about what you said before, you know what you said.

Tip 4: Find a Friend to make you memorize-  I like this one. When I see my friends recalling from the other day lesson, I joined them to get more details. 

Tip 5: Create your own Notes- When my teacher explains a lecture, I made a note of what he said, then I read it again.

I hope that this will work for you God bless you all :)