The truth of the matter is that most major success in this right-brain, internet-connected, uber-competitive world no longer comes from doing things consecutively. If you do things consecutively, you lose. This is a fact. Slow and steady may have won the race in the past, but today, in order to even get into the race, you have to be the one organizing it too, and doing everything all at the same time.
Doing one thing at a time is a recipe for a life that won't keep up with your dreams.
It seems to me that one of the great luxuries of life at this point is to do one thing at a time. One thing to which you give yourself wholeheartedly, uni-tasking.