From http://www.forbes.com/sites/johnnosta/2013/02/25/the-genius-of-raising-brilliant-kids/

Limit rules, encourage independence.  We have ‘minimal rules’, but nothing that stifles creativity. Basically, you can sum it up simply: treat people with respect, do your homework be honest and try to be safe.  Having too many rules burdens down the entire family and limits thinking.