Ideation if done structurally really helps us to think outside the box. It a fairly organic process but in order for one to be successful wrt the out of the box solution one has to understand the properties and limitations of the box fairly concretely. One way to think outside it is churn and innovative on one of the limiting factors of the box picking proven solutions for the same problem in totally new areas.
e.g Using cool icebreaker from party scenarios in to business meetings -
- Split folks in groups - share 2 unique things about everyone, test on the same.