depending on the company culture
the best way is to have an alternative plan and tender your resignation, if they reall want you, they will counter-offer; if they don't counter-offer, you can also move to another company.

There is no 'proper' or standard way to ask for a raise or salary increase.
It's not something that people are trained to do, and little is written about it. People use various approaches: they can write; discuss informally; discuss with colleagues and hope the boss gets to hear; they drop hints to test the water; they ask the boss politely; demand firmly; go over the boss's head, or maybe even threaten to resign, secure another job offer, or simply resign.

好好地跟你的manager谈。
一开始可以informal discussion,hints 他说现在的生活费越来越沉重。。。。等等等。。看他有什么反应。
说一两次然后他没有什么反应可以：
１。给他有错觉你好像要开始找工作
２。直接给他谈

当然在要求加薪的同时也要offer给公司知道你可以帮忙做好什么东西，你的value 是什么，你要学什么，让他们觉得你是想要继续在公司发展，跟它一起成长。这样他才会觉得给你加薪是重要的。

p/s: 不要直接丢信拿辞职来当作武器，不是每个
manager都管用的。
我的staffs如果用这招我是会请他快点走。对其他的员工不公平，也扼杀了你全年的努力。
如果你的manager没有帮你plan career path，那也算了吧，这个manager只为自己利益，没有fight for 你，应该要好好的自己计划一下了。

The most important is your value
My basic salary increases from 2800 to 6500 in 1.5 years after I joined the company and annual salary increases to more than 100K. Because I brought in 3 million revenue and 800K net profit for the company in a year.

又一个血淋淋的例子 － 做市场的爬得快
俺是做技术的，只有慢慢来罗。

通常比较大的公司，辞职信是不能成为武器的
对于管理作的好的大公司来说，每个人只是一个螺丝钉。他们不是很care员工辞职。

有时候，还会跟辞职的人说：wish you hv a bright future之类的。。。