On reading
Can't really say that I've followed this advice too closely, but it doesn't sound like a bad idea:
"A student will find that his mental constitution is more affected by one book thoroughly mastered than by twenty books which he has merely skimmed, lapping at them."
- Charles Spurgeon (via John Piper and then Z)
I suppose that as a grad student at the moment a fair bit of reading is pretty much inevitable though.