You should have a mind of your own.

　　你要有主见啊。

　　have a mind of one's own 这句习语就是：“有自己的意见、想法”的意思，也就是汉语里面说的：“自在主张，性格果断”。因此，当美国人说"You should have a mind of your own."时，他/她要表达的意思就是:"You should have your own opinions."、"You should make your own decisions."、"You should not get governed by the views or choices of others."。

　　情景对白：

　　Shirley: Both of the two plans are feasible. It's hard for me to choose. Can you decide it for me?

　　雪莉：两种计划方案都可行，真的很难选择。你能帮我决定吗？

　　Benjamin: Oh, sweetie, it's up to you. You should have a mind of your own.

　　本杰明：哦，亲爱的，这件事情你说了算，你要有主见啊。

　　搭配句积累：

　　①I can't decide which scheme is better.

　　我不确定哪种方案更好。

　　②You'd better not always listen to others.

　　你不要总是听别人怎么讲。

　　③Don't turn to others for help whenever you're in trouble.

　　不要遇到点麻烦就向别人求助。

　　④Don't just echo the views of others.

　　不要人云亦云。

　　单词：

　　feasible adj. 可行的

　　She questioned whether it was feasible to stimulate investment in these regions.

　　她对在这些地区刺激投资是否可行表示怀疑。

　　That may be fine for the US, but it's not feasible for a mass European market.

　　那也许适合美国，但对于庞大的欧洲市场却并不可行。