Try to eat lot of nuts, its help ..work hard

I wish you all the best luck ^_^ !!

the correct way to write the sentence is : I have an exam soon and I find it difficult 

Drink green tea.

https://oneclass.com/blog/knowledge/9820-part-1-learn-how-to-memorize-top-6-memorization-techniques

The answer is One word practicing ^^ 

Practice is really helpful, I believe in the Famous line that said ( practicing Makes perfect [emoji]✌️  )

GOOD LUCK  ^^ 

i  recommand to you .if you dont focus on your mind . you should goto the library.

and for rest you mind go to the pool . or gym  . and then have usefull food such as Walnut , Almond Hindi