Yeah Chuck, I've heard that too...sound advice!
As far as playing multiple tables; I myself don't like it...too distracting, and you can't get a feel for the other players at the table. I like to watch and see what they raise with, call with, what bets/raises they will fold with. You might not be able to see
, but you can still get a read on them none-the-less. That way you can adjust your game accordingly; some tables you can get away with bluffing a little more, some you have to play more tightly, etc.