How I study.

I use the Pomodoro technicque, where you have to study for 25 minutes and rest for 5 minutes.

It helps to keep your concentration, and you can havtake a breathk every few minutes.

take a break = rest for a while

Moreover, I usually start with simple tasks, (like underlining the text with beautiful colours, etc.)

"Etc." is usually used if you have 2 or more examples in a sentence

and of course I turn off my phone to avoid distractions.

Finally, pleaseI drink a lot of water!

Usually in writing, we use the same point of view (example: if you start with "I", the whole text uses "I"; if you start with "You", the whole text uses "You").

If you want to keep the "you" from the original sentence, I would suggest: "If you will study, please drink a lot of water!"

It is essential to keep myour body and your mind hydratated.

How I study.

Titles in English usually don't end in periods!

I use the Pomodoro technicque, where you have to study for 25 minutes and rest for 5 minutes.

It helps toyou keep your concentration, and you can havtake a breath every few minutes.

Or maybe you can use an idiom: "It helps you keep your concentration, and lets you take a breather every few minutes".

Moreover, I usually start with simple tasks (like underlining the text with beautiful colours, etc.),

Using the definite article "the" feels weird to me if I don't already know what text you are talking about!

Finally, pleaseI drink a lot of water!

"please drink a lot of water!" is grammatically correct, but strange to say when the rest of the post is written about yourself in first person.

It is essential to keep your body and your mind hydratated.

You could also write "It is essential to keep your body and mind hydrated.".