Tldr; 1. Don't multitask. 2. Sleep hygiene. 3. Don't have a boring job. 4. Write stuff down to remember it better.

Life changing stuff.

No doubt this Professor explained it differently or is just doing this fluff piece to promote their book because the above is nothing ground breaking.

For what it's worth though they are right to focus on multitasking. Forget pop psychology, no one can multitask effectively, nor can they task switch continuously in an effective manner. You will always just end up doing 2 or more jobs poorly.