My prayer life is mostly a constant state of communication in my mind and thoughts. There are many moments when work, life, and the unexpected take place that requires my absolute focus. But in general I praise, meditate, pray constantly.
I read my Bible daily and take what I read to see how it applies or how I can apply it to my life. But I have developed a constant line of communication through my thoughts.
I also have created a habit of saying the Lord's Prayer that He taught to His Disciples every night before bed time which I do pray verbally in a normal speaking voice.
For me, it's habits that I believed were good to do and eventually they become normal activities in my daily walk in God.