As for the many-headed beast in me, one of its heads can hyperfocus. It is suggested that we consider this our strength and reap its rewards. It definitely makes multi-tasking a cinch for us. And where would one be without this ability in today's world of PDA's, iPhones, IMs etc.
Here one needs to draw a balance. The 2006 batch of freshmen at John's Hopkins University were found to be very proficient at multi-tasking but a large number of them were dreadfully unequipped to prioritize and manage their time efficiently.
When we multi-task our attention and comprehension is obviously divided and unequal to undivided attention. I invariably play games on my laptop while watching TV. Needless to say my attention toggles between the laptop and the TV. If the latest CSI or Mystery episode proves to be more gripping than usual, my game score starts plummetting. Well, elementary, my dear Watson, you say. Yes! and this has been proved in clinical studies as well.
However, it does have its own benefits. I can spend time obstensibly with others watching TV but I can also be IMing others half a continent away. Besides it helps me tolerate the boring shows that others opt for. It helps me compromise and win some brownie points AND (just between you and me) hang on, tooth and nail,to some vestige of my sanity.