Honestly speaking, I do not think I am a good adviser in this field since I am just a workaholic. I like to spend my time writing articles or reading something. So, I think the only advice that I can give is that if you want to work effectively, you should work hard. Besides, if we are talking about teachers and professors, we do not have such meaning as weekends. We are in touch every day: during holidays or weekends we check emails, consult our students, do paper work and so on.
So, the main idea of time management is to use every minute efficiently and rationally. There is a good Chinese saying: “Only by following the example of the best you can reach the average; imitating only the average, you will achieve small”.