Many take pride in being able to do several things at once. Unfortunately, unless you are one of those very rare people who can actually do it, multitasking means doing things more poorly than if you had singletasked each task.
Research from Vanderbilt University indicates that people trying to do two tasks at once took up to 30 percent longer and had twice the mistakes of those who did the two tasks sequentially. Think you’re one of the special ones? Try the following task: Time yourself as you say, “abcdefg,” immediately followed by, “1234567.” Got it? Okay. Now do the same, but say, “a1b2c3d4e5f6g7.” Any difference in time and flow?
You get the picture. Sequential singletasking is much better than simultaneous multitasking. Try it. You might like it :-).
Taken from Caroline Webb’s book, How to Have a Good Day: Think Bigger, Feel Better and Transform Your Life