They're equally important.
The techniques FLOW from the attitude; they can't be separated. It's like a carpenter with a shop full of tools that s/he doesn't know how to use, you know? If you don't have the right mind-set, it won't matter how many tools/techniques you have at your disposal.
Likewise, you could have the right mind-set and poor techniques in place.
One without the other, a top performance does not ensue.