What are the ways to prevent health problems?

Hello [이름]!

Thank you for doing your homework. :)

I understand that English could be really difficult.

But it only takes faith and confidence in yourself to perfect it.

You are a smart person and I know that with constant practice you will do great… ^_^

Xoxo,

T. Christina ^^

Here are my corrections for you:

I think there are three crucial things to take care of. 

>> I think there are three crucial things to think about. 

First is your sleeping time. 

>>CORRECT!

Too much sleep can make you feel even more tired and lazy, but too short sleep makes your brain stop thinking and your immune system could also be an error. 

>>Too much sleep can make you feel even more tired and lazy, but less sleep makes your brain stop thinking and your immune system could also go down. 

7-8 hours of sleep every day is the ideal time for sleeping. 

>> CORRECT!

Second, you should keep yourself clean. 

>> CORRECT!

Wash your hand frequently, and take a shower every day. 

>> Wash your hands frequently and take a shower every day. 

Don\'t forget to brush your teeth after having a meal. 

>> CORRECT!

Thirdly, you should take care of your balanced diet. 

>> Thirdly, you should have a balanced diet. 

Eating healthy foods is also very important for your immune system. 

>> CORRECT!

Try to have a meal at a fixed time every day.

>> CORRECT!