I definitely can be accused of occasionally sipping from the multi-tasking koolaid ( I type all this up as I have 25 tabs open on my Chrome browser and interrupted my cultural Anthropology reading to post this.). But seeing the futility in such an approach, I'm determined to convert to uni-taskism. As Steven Aitchison and the Frontline special "Digital Nation" * forcefully argue, multi-taskers are less efficient and productive then folks on the straight and narrow path of task completion.
The Death of Multitasking and Rebirth of Unitasking - by Dumb Little Man
*btw, you can not only watch the full episode online for free (and watch it on netflix), but you can download the podcast, and the podcasts to most former