Originally posted by chucklivesoninmyheart
Just take the riffs youve got and transpose them to the whole step down you have at your disposal.

That would be 2.5, or even 3.5 steps down in some cases.

But yeah, you can basically play anthing you've been playing on your six string.
Another thing you can do is look up some bands you might like that use seven string guitars, and learn their songs.