title_body: Should I grind my coffee beans at home, or en masse in the coffee shop?
upvoted_answer: That's pretty straightforward: if you're not too lazy and have the equipment at hand, always grind only the amound needed just before brewing.
  
  Check out this answer for impressive data.
  
  Now if your beans are year old already, this might not make a huge difference --- but there's no way that grinding it all at once could help you have ``somewhat fresh cups''.