I am convinced there is both intent and discipline involved. However, I am more and more convinced that like most aspects of the life we are called to as Christ-followers, this is not about separating and compartmentalising it into neat little sections. Whilst there is a time and place to find a quiet moment to read, reflect and pray, my thought is that there should be many moments like this scattered throughout our day, even if quickly snatched and cherished here and there between entertaining restless children, dropping shopping off to vulnerable neighbours, checking on patients or residents in care. You might be on the move and loaded with heavy burdens and it is here that we are encouraged- commanded, even- to take a moment to quiet our thoughts and seek out the God who is “our ever-present help in times of trouble”. Any feelings of guilt or “I should be doing x, y and z” are not His words to you, so bring those to Jesus as well, and watch Him hush and still them.
I recently spoke to a supporter who shared her daily prayer with me, which I think is a wonderful way not only to begin our day, but to keep praying throughout: “Lord, help me not just to fill my time but to USE it.” I am sure that sometimes this use of time, whether it be seconds, minutes or hours, is simply: be still and know that He is God.