I do quite a lot of multi-tasking. Can't be helped if one has kids, a husband around everyday and every night (not LDR), & a business. BUT not everything can/should be multi-tasked, or else the output quality suffers or the task is not finished on time, or not performed at all. Usually, multitasking involves repetitive, simple or no-brainier tasks. Or uncomplicated tasks that can overlap given a chunk of time. Or, complicated tasks that are closely related & are sequential or overlap within a chunk of time.
Common sense will guide one.
Like, don't multitask when writing checks, or attending to hubby, though these may not be complicated stuff.
Some office/business tasks can be done simultaneously -- specially if these are mainly monitoring or following up on employees.
Personally, most of my multitasking involve house staff supervision, my cooking, and shopping, or when I attend to my personal needs like my daily toilette, salon time (yes, I try not to, it's supposed to be relaxation), or watch tv.
I try my best to avoid multitasking when socializing -- IMO, it is impolite. Well, unless I am hosting -- in which case, all my antennae are out, & I have eyes even at the back of my head.
I am able to do complicated multitasking for related tasks like watching Bloomberg, monitoring real-time my NYSE account while computing my paper profits/loss & googling certain economic developments. 2 laptop yan and the TV sabay binabasa/watch ko.
What other examples? I can multitask while cooking. But baking & grilling require my 100percent focus.
Multitasking can't be taught. Sure, we can discuss what we do -- but, the performance of multitasking really is unique to each person. If one manages her/his multitasking reasonably -- the results are good.