Conversation so far:
Did Avenged Sevenfold put out any records between 2006 and 2008?
On October 30, 2007, Avenged Sevenfold released their self-titled album, the band's fourth studio album.
Did Avenged Sevenfold's self titled album do well?
Avenged Sevenfold's self-titled fourth studio album debuted at No. 4 on the Billboard 200 with over 90,000 copies sold.
Did Avenged Sevenfold tour from 2006-2008?
Avenged Sevenfold headlined the 2008 Taste of Chaos tour with Atreyu, Bullet for My Valentine, Blessthefall and Idiot Pilot.
What album was the Taste of Chaos tour promoting?
The Taste of Chaos tour was promoting Avenged Sevenfold's self-titled fourth studio album.

Question: What else did they do from 2006-2008?
Self-contained rewrite: What else did Avenged Sevenfold do from 2006-2008 besides releasing their self-titled fourth studio album, and headlining the 2008 Tase of Chaos tour?