An interesting approach to documentation while you are in growth mode. Ask "Why" not "What".
"While you're in growth mode, it's likely not worth your time to even attempt to get to the 'what' level of documentation..."
"...the highest levels 'why' including company values, mission/vision statement, and steering principles. In fact, if your organization doesn't have those and is trying to grow, back up a step and make sure that happens!"