During a recent workshop, I suggested that we consider "mono-tasking" instead of multitasking. There was a lot of pushback. Most of us are conditioned to think that multitasking is a good thing. Ask yourself, "Why are so many tasks left unfinished? Why do I find it difficult to focus? When do I get to sleep?"
As a presenter, make it easy for your audience to receive your message as intended. Have them focus on one thing at a time. Release your information is small digestable chunks, and then check to see that it is understood before moving on.
Yes, this is common sense, yet, it is not common practice.