1.I need some nice, normal school activities to throw myself into.
我应该多参加一些常规的校园活动

throw oneself into
投入...

2.Still haven't got the hang of it?
还没掌握诀窍吗?

找到...的窍门

3.-Give me a minute. -Take your time.
-等我一下。-不着急。

不慌不忙

4.I am lucky just to know someone like her,let alone have her as a friend.
能认识像她,我真的很幸运了,更别说还能和她成为朋友。

更不用说;不理,不管(惹)

5.I guess you can't judge a book by its lip gloss.
真是看不出来啊。

judge a book by its lip gloss
以貌取人

光滑的边缘

6.You're not a "something for nothing" kind guy.
你也不是那种不劳而获的人。

轻易得来的利益, 不劳而获 

说曹操,曹操到。