how do you plan to be successfull

您的句子有很多语病哈~~
正确表达应该为 your plan ,be successful

work hard~

study

To be successful, firt set a reasonable goal,second, accumulate sufficient corresponding knowledge, last but not least, seize the opportunity that can help you

hold chance

How do you plan to be successful? 在语法上是完全正确的，楼上的不要误导。

你可以参考的观点如下（请注重plan的部分）：
1－Make a list of short, medium, and long term goals - the driving forces and purposes behind everything that you are and do.
2－Create a qualities statement and give yourself a monthly analysis.
3－Take time for reflection, planning, and analysis of learning.
4－Never fail to appreciate the small things in life.
5－Always think positively.
6－Never stop learning.

希望回答对你有帮助。