expression, suru verb (irregular)
make sure to; see to it that; try to
Attaches to a verb in the dictionary form or negative form to express making an effort or ensuring that something happens. The meaning ranges from a conscious effort to a habitual practice.
毎日、日本語を勉強するようにしている。
I make sure to study Japanese every day.
忘れ物をしないようにしてください。
Please make sure you don't leave anything behind.