Question for those who play more than 1 sng at a time...

How do you keep up? when i play 1 or 2 tables at a time i do fine but when i try 4 tableing as i know so many people do i end up not being able to focus as we get in the higher levels and even the tables where im chip leader i end up busting out cause im trying to balence all the tabeles at once, any suggestions?