Perhaps for the advanced player, viewing the Daily Routine as a Daily Maintenance program would be a more apt description of what we are trying to do each day. Too often the low register is ignored. It is easy to end up playing primarily in a register we feel comfortable with and can control. We need to expand our control and consistency by playing in the more extreme registers at ultimately louder and softer dynamics. Always strive for your best tone quality and a beautiful sound.
Consistency is the key word here.
If we are inconsistent, then work on these areas in your routine every day. Work slowly to expand and improve these areas rather than try to make extreme changes too quickly. Those who have played at least three yaers or more will find it very worthwhile to explore new and diferent daily routines. We learn much about our individual embouchures, what works on one day may not work well on another. Some days when we feel stiff or tight we may need to do fewer lip slurs, but more soft playing, primarily in the low register.