为了自己而好好努力，让自己的生命更有意义！用英语怎么说？

Strive for yourself to make your life more meaningful.
如果楼主是指“我自己”，则将句中的 yourself 改成 myself，把 your life 改成 my life：
Strive for myself to make my life more meaningful.

To be hard-working for myself. To make my own life become more brilliant.