I think this correlates strongly with the idea of "Defaulting to Yes". If someone has an idea or a suggestion, your default position should be, "Let's try it and find out" instead of the unfortunately more common "That won't work because..." response.

Discussion is good (because ideas are surfaced and knowledge is shared) but long discussions are bad (because action is delayed). Action is good because that's how you learn things. By adopting an "Let's try it" attitude, you can move from discussion to action more quickly.