忙しかったら、ストレスが本当にだんだん大きくなりますね。。

Management of Schedule

Time Management of Schedule

こうやさん、This is a very nice message. I think you are right. 

* "Peaceful is coming from the calm" - This phrase doesn't work in English. The words "calm" and "peaceful" have very similar meanings. Both are adjectives meaning 平静な, 静かな, 穏やかな, etc. So it is not clear how "calm" will lead to "peaceful" because they are already almost the same. Also, "peaceful" needs to become a noun such as "peacefulness" or "a feeling of peace."

By the way, "pace" means "speed" or "rhythm."

** I like this statement. But to make it sound better in English, the first part (don't be fast) and the second part (do well) need to have the same structure: "Don't be fast. Be well." or "Don't do it fast. Do it well." Both are correct. It depends on what your meaning is.

It says there's a correction on this, but I click and there isn't' one...

Management of My Schedule (Or: Managing my schedule)

"If we are always busy" sounds slightly more natural than "If we always are busy".  Could also say "If we can do this well". "fast" is okay, but more associated with speed.  You could say "Don't do things fast, but do them well."  But I think "be hurried" is better than "be fast" here since "be fast" could have a positive connotation whereas "hurried" is more rushed like one might make mistakes.  "worthy to try" is "The young knight was worthy to try out in the joust."  versus "The food was worth trying."

Management of Schedule

I believe that peaceful is coming from the calm. > I believe that a busy work schedule causes a lot of stress and prevents us from having a calm mind at work.

If we always are busy, we cannot keep our peace. > If we are always busy, we cannot have a peace of mind. 

So I think the management of our schedule is very important for it. > So, I think how we managed our schedule is very important for this reason.

If we do well for it, we can keep our peace and calm.> If we manage or plan our schedule well, we can free ourselves from a lot of stress and have a peaceful and calm state of mind at work

And we can be peace always. Don't be fast but do well. > And we should always have a peace of mind at work .You don't have to do your work really fast, just make sure you do it well. 

Can you do it? It sounds very difficult, but I believe that it is worth trying.  worthy to try!!

Keep/ hold one's peace (idiom) >>> to refrain from or cease speaking; keep silent.