How Do I Receive the Baptism of the Holy Spirit?

What is the Baptism of the Spirit? Is it something every Christian has? Can I receive it? Is it still available today?
A great book to read on this subject is Joy Unspeakable by D. Martyn Lloyd-Jones http://www.mlj.org.uk/mlj.nsf/(PRODUCTS-BYCODE-WEB)/MLJB.3956