Prayer and fellowship with God is so central to our existence and spiritual growth and development that (1 Thessalonians 5:17) tells us to pray without ceasing. Pray without ceasing does not mean non-stop talking or a continuous stream of uninterrupted conversation from the time you wake up until the time you go to bed as that would be impossible, Praying without ceasing is more about an attitude of the heart, an attitude of God-consciousness and God-surrender that we carry with us all the time so that prayer becomes our first line of offense as well as defense rather than our last resort.
Praying without ceasing is about living in the awareness that God is with us and that He is actively involved and engaged in our thoughts and actions. So in essence, unceasing prayer should be as simple and as effortless as breathing - meaning you don't think about it, it's just part of who you are and what you do naturally to sustain yourself.
When you do a random act of kindness expecting nothing in return ...this is a form of prayer..you are loving your neighbor as yourself and you are talking to God by living out your faith. When you give up your seat on the bus or subway for someone who is elderly, this is a form of prayer, because you are living out your faith and demonstrating the fruit of the spirit. If you volunteer at a homeless shelter, this is a form of prayer. If you encourage someone on your job and met a tangible need of someone, this is a form of prayer and God not only sees everything but hears OUR PRAYERS especially when we go beyond giving him a list of requests and we start living out our faith. And remember if prayer is like breathing, then it's always easier to BREATH (Pray Without Ceasing) then it is to hold your breath.