Please, correct my mistakes.
I have my exams this summer so I decided to write a notebook entry to practice my writing skills in English. I'll write about my feelings about exams so... this entry can might be a quite boring.
Anyway, I'll write it...
Every day I spend the biggest part of my free time preparing for exams. Usually I start with reading some theory and thean I take tests. There'a a place for situations when Sometimes I've just read a needed paragraph and then I realize that forgoet almost all what I've had read. It really upsets me. I think everybody will  anybody would be upset by because of such a thing.
Almost every day I have there're thoughts that I'm swimming in the an ocean filled withs tests, papers and, books, and that I'm covered withI am filled with a stress. I wish it would will end very, very soon.

This entry reminds me of about a blog post post in a blog...

P.S. Thank you for reading.

This is very good... you only have a few subtle mistakes and they are with more complex English grammar themes that many native speakers may have trouble with. 

One suggstion is reviewing when to use will vs. would-- I noticed that that was a consistant mistake in your writing.

Great job!