Dallas Willard on 'quiet times'...
My main problem with “quiet time” is that I want my whole day to be quiet. I don’t go into quiet time to be something that I have and then depart from into “noisy time.” No, my main business is to make the whole day “quiet time.”
So, given the day, I may have an extended time of the study of Scripture or prayer, but that depends upon which day it is because some days, I simply can’t do that. And I don’t think there is anything wrong with that. There would be something wrong if on those days I took a vacation [from being with God], but I don’t do that. Jesus said He would be with us always, and that’s the center of what I try to do. I try to be with Him.
I have other periodic things like fasting. I try to fast some period of time each week and do longer fasts periodically. Then, of course, worship and all of the things that we might think about on a periodic basis, but my objective is to have the Lord always with me.