Firstly, you should know what do you need to study? If you are salesman or trader, you will find some materials about that.
Secondly, you must know what's your purpose? when you find a good book you want to learn it. what's your level now? what's your target in future? Thus, you must be know your position now.
Lastly, this is my suggestion. You'd better find a good partner to study together everyday. You guys could make up disadvantage by each other.
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