I will keep silent because talking or repeating myself will not do any good.

VOA: special.2010.01.24

and that will keep you busy for a good couple of days.

就会让你开心地忙好几天。

卡姆登最棒 - SpeakingMax英语口语达人

This means you will become good at something if you keep doing it.

VOA: special.2009.03.01