You must seek and invite outsiders into the conversation to think outside the box.
To get truly unique ideas you have to invite people who are not part of the community or live outside your box. This means people who are not part of the discipline, do not speak the language, they don’t know the inside jokes, the handshake or belong to the club. These interlopers will bring the different perspectives, ask the wrong questions for the community, which are the right questions and pose the unique ideas. To think outside the box, you must invite the outsiders into the conversation.
It’s easy to give this practice a nod and lip service, making it happen is much more difficult. The difficulty is finding these people and then listening to them with the same appreciation as though you agree with them or understand their contrary ideas.