"Satisfaction of one's curiosity is one of the greatest sources of happiness in life." -Linus Pauling
Reading is definitely one of the primary ways I satisfy my curiosities (even if it's just reading from Wikipedia!). Reading The Renaissance Soul has spurred me to consider more deeply what makes me want to learn more, and how I satisfy that desire.
A limited list: music, business, knitting, literacy, art, Spanish, technology, painting, beading, design and spirituality. I have studied/practiced many of these topics for years, but others are brand new! But I know books will be a part of my exploration of all of them.
What are you curious about? How do you satisfy that curiosity? Does it bring you happiness?