This means you try to do something. You make an effort to do it. Or you try not to do something.
Verb [dictionary form] + ようにするPrimary
Verb [ない-form] + ようにする
This means you try to do something. You make an effort to do it. Or you try not to do something.
健康のために、これからは毎日30分歩くようにします。
For my health, from now on I will make a point of walking for 30 minutes every day.
会議中は、個人的なメッセージを確認しないようにしてください。
Please try not to check personal messages during the meeting.
子供が怖がらないように、お医者さんは優しい声で話しかけるようにした。
The doctor made an effort to speak in a gentle voice so that the child wouldn't be scared.
できるだけ自国の言葉で話すようにしているが、難しい単語は英語を使う。
I try to speak in my native language as much as possible, but I use English for difficult words.
もう夜遅いから、大きい音を立てないようにしてね。
It's already late at night, so try not to make loud noises, okay?
This grammar shows that something is not always easy. It takes effort. You might need to work at it. Or other things might make it hard.
This is different from "〜ことにする". That means you made a decision. This means you are trying to do something. You are putting in effort. For example, "I decided to quit smoking" is a decision. "I will try not to smoke" is an effort.
Use this when you want to give advice. It makes your suggestion sound gentle. It is not a strong command. You can ask someone to try something new.
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