Good Question. I do not have a web site. All I do is write on Hub Pages, but maybe you should examine more closely web sites that do have high volume traffic.
I think it is important that whatever you write, write well. Try to create a product that you would like to read. What is fascinating to people ? I like beautiful pictures of tigers, and horses. Fantastic pictures in Hubs probably help readers to enjoy them more.
Whatever you do in life make it interesting. Whatever subject you write about make it interesting.
As for traffic, you need to learn from the experts. There is a lot to be learned if your seeking high volume traffic. Good computer knowledge helps you to know how to use certain links to other sites.
Ask more questions on the subject, and seek more details, and of course follow all rules.
God Bless You.