When I want to nitpick nowadays, I just keep in mind that if I want to go to the trouble of offering unrequested advice, I might as well suggest I do it myself.

现在，当我想吹毛求疵时，我就会想象如果我自己根据那些所谓的建议来做这件事会是什么样。

youdao

It wasn't until we each went our separate ways that I began to learn how to do things for myself.

直到我们各奔东西后，我才开始学会如何自己做事情。

《柯林斯英汉双解大词典》

He did the work so badly that I had to do it all over again myself.

他活做得太糟糕了，我只好亲自从头再做一次。

《牛津词典》

I said to myself: 'I am not going to do it.'

VOA: special.2010.08.01

If you're at home, you'll do it with your family, now you're in university, where do I do it, who do I go and eat with, I might be by myself at my dorm room.

如果你在家里，你会和你的家人一起，而现在你在学校里，就不知道在哪里，和谁一起去吃这顿晚餐，也许就自己一人在寝室。

普林斯顿公开课 - 人性课程节选

I just don't think I could do it myself.

我只是不认为我自己可以那样做。

美国的出版市场 - SpeakingMax英语口语达人

Shoveling is good for me, I tell myself, I always do it myself and I always will.

FORBES: 4 Reasons Leaders Hire in 3D

What McDonalds is saying is that if I want a Big Mac I can just do it myself.

FORBES: How To Make A Big Mac At Home

However, I do it because it is a promise to myself.

CNN: Interview with K.J. Choi