It is all very well reading things in a book. What really matters is to practice on real data. A good step is to enter some data mining contests that appear on the Internet. Your place of work will almost certainly have data; if you can add value to it to solve a business problem you will get a lot of interest. The Internet itself has more sources of data with more being added every day. Finding a new insight into public sources of data, even through a simple visualization, may get you noticed.

In short, there is a lot of data out there just waiting to be explored. I earnestly hope this book has whetted your appetite and given you the ideas, tools, and confidence to get stuck in.