I have found that if I stay in the Word daily, it makes a huge difference in the amount of peace I have and how I am able to deal with things that come up.
I miss more than one day and I can tell.
One more that Im struggling with, even when I do read in the morning and/or meditate on it throughout the day, I often neglect re-reading or reading some new scriptures again in the evening.
I heard a good sermon on this and reasoned that Adam and Eve, before they sinned, got to walk with God in the cool of the day so morning and evening is implied there and I think also what naturally occurs when walking together - talking, asking questions, listening and learning.