Maintaining a blogbook

I had made a resolution that I would write something every week .So much for my resolve!
I keep reading this simple blog called 'Rhythmic dissonance' authored by Raj.A nice blog with simple epiphanies!
On the Fox television series "House M.D.", main character Dr. Gregory House has an epiphany in almost every episode.I used to watch this series when I was in England and used to like it a lot.Dr house is almost my idea of a senior doctor,one who has seen too much and done too much...although his epiphanies do help his patients a lot...
I wonder how novelists get so many words out of their mind.If I start writing something,most of the stuff that comes out will be related to medicine.So,how did Stephen King write so many horror novels?He could not have lived through all the stories.Take for example,Louis L'Amour,who writes Westerns.The moment I start reading Westerns,I am transported out of this world and into a world of deserts,guns,chasing waterholes and riding horses.
I have started doing gardening.It gives a good feeling to watch things grow from nothing and bloom in all their glory.The habit is quite expensive,especially for inexperienced people like me!First,we have to decide which plants to buy,get good soil,re pot them,water them daily,spray insecticides..to take proper care.I suppose I should start looking out for gardening blogs and subscribe to them.