When you think about it we all have the same amount of time in the day. You can't manipulate time. There is no such thing as time management just self management. So how people use or waste the time they already have is the issue.
In stead of writing a to do list. I'm going to write a not to do list and check that off every day. I already know what I have to do during the day. It's the things I shouldn't be doing that wastes my time. Self management not time management!