I started blogging on SEO in 2007 when I launched my first blog ever queknow.com. Blogging was my motivation to learn SEO and my boss wanted me "to know everything". In two months I was offered a SEO blogger position at Search Engine Journal. I quit my day job, found some clients and kept blogging. 5 years later I am still doing the same thing not because I have to, but because I thoroughly enjoy it! I am more into content marketing and community managing than SEO nowadays.