Increasing vocabulary

I got a vocabulary book yesterday. The book came with 2 CDs. I can also listen the words. In the book, the learner memorizes 16 words in a day. 70 days later, I will be a word master? My English learning tool are newspapers and NHK radio lesson and so on. Any tool I use is cheap. I think there is no royal road to learn English, and it is possible to learn English with very small expense. However, I sometimes buy some books for a change of air.