Read as much as you can (i suggest local library as FREE!) but buying books also works, second hand books just as good as the real thing.
#39: Read some more
Read blogs on all facets of business, cashflow, finances, marketing, delivery, there is an infinite amount of free advice out there, filter the best ones and listen.
#40: Rewire your brain
Take yourself into exact opposites, try a new sport, a new hobby, read a case study on a different industry. Exploring them will help you understand your own business better.