I'm in the middle of two writing books: On Writing by Stephen King, and The Art of Writing by John Gardiner.
They both make the point that in order to write well, you must read a lot. Tonight I drew up a list of 30 books I want to read. As a child, I went through one 300-page novel every 1-2 days, but now I am 50 times slower.
Growing up, my mother repeated daily to me that reading novels is a waste of time. To parents out there, please don't stop your kids from obsessive reading! You may be suppressing their deep love for literature and ingraining guilt into them over a passion that they cannot control! Take the time you would've spent forcing them to play the piano / violin / cello and let them read instead.