When I'm giving a speech, I don't have the ability to squeeze in a phone call, think about what's for dinner or plan tomorrow's meeting. I'm doing one thing, and it's taking everything I've got. So yes, I'm busy, all in.
On the other hand, we all are familiar with the other kind of busy, the busy of feeding one kid while listening to see if the other is still napping, while emptying the groceries, checking email and generally keeping the world on its axis.
I have two suggestions:
a. if you're used to being one kind of busy, try the other one out for a change. You might find it suits you.
b. if what you're doing isn't working, if you're not excelling at what you set out to do or not getting the results you seek, it might be because you're confused about what sort of busy is going to get you there…