I say that I read a lot, and I say that I write a lot too. But mostly I just read books on writing. Even more than reading these books, I like to buy them, and then put them on my shelf and look at them. That’s almost like writing, really.
But if you happen to read them, one thing all these books will tell you is: KEEP A JOURNAL.
That way, when one is not writing something of purpose one can practice writing purposelessly, and that purposeless writing might eventually work itself around to something purposeful and yadda yadda yadda, at this point I usually stop reading.
Besides, I don’t really need to journal to write purposelessly.