You have a lot of things you need to do.
You have your career to worry about.
You may be married or in a serious relationship (or seriously hoping to be in one!).
You probably have children (or are contemplating having a child).
You have educational concerns.
The economy is tanking.
Your job may be moving you to a new location.
Plus, you're trying to get your weight to a certain level, or you're trying to get a new car or something is going on that desperately needs your attention.
The point is - you're busy.
As a matter of fact, busy should almost be eliminated from your vocabulary because when are you not? Busy could very easily be substituted for the word 'normal' because that is how your life pretty much always is.
This is why you should not attempt to multi-task.
Multi-tasking is highly inefficient. The more things you try to do at once, the less you can actually devote quality attention to any one of those things. It's possible to do two things at once reasonably well, but only if one of those tasks are not very challenging.
For example, you can watch tv (that doesn't take much mental energy) and write a letter, but it's very difficult for you to write a letter and program your DVD player at the same time (both require too much attention). Conversely, it's difficult to raise young children while going back to school or train for a marathon while putting in 80 hours a week at work.
You CAN have it all - just not all at the same time.
Meaning, you can focus on raising your small children this year and, when they get a little older, you can finally go back to school.
Or, you can put in 80 hours a week at your job for career advancement now and train for a marathon two years from now when your job is a little more secure (and you're a little better paid).
It's really, really, really hard to do more than one tough thing at a time well.
Focus instead on the most important and pressing thing you need to do today. Do that well and give it most of your energy. Of course, accomplish all those small things that you HAVE to do, like going to work, grocery shopping, cleaning the house, etc. But save the greater amount of your energy and drive for that most important thing.
And when that thing is accomplished (or well in hand), then move on to the next task.
Until you accomplish all those things that are important to you.
One Single-Task at a time :)