"Very early in the morning, while it was still dark, Jesus got up, left the house and went off to a solitary place, where he prayed." - Mark 1:35 

What more can be said? If the Master found it necessary to start the day in solitary prayer, what about his servants?

"The men who have most fully illustrated Christ in their character, and have most powerfully affected the world for him, have been men who spent so much time with God as to make it a notable feature of their lives. Charles Simeon devoted the hours from four till eight in the morning to God. Mr. Wesley spent two hours daily in prayer. He began at four in the morning. Of him, one who knew him well wrote: “He thought prayer to be more his business than anything else and I have seen him come out of his closet with a serenity of face next to shining.” John Fletcher stained the walls of his room by the breath of his prayers. Sometimes he would pray all night; always, frequently, and with great earnestness. His whole life was a life of prayer. “I would not rise from my seat,” he said, “without lifting my heart to God.” Luther said: “If I fail to spend two hours in prayer each morning, the devil gets the victory through the day. I have so much business I cannot get on without spending three hours daily in prayer.” He had a motto: “He that has prayed well has studied well.” - E. M. Bounds in Power through Prayer

If you're too busy to pray...  you're too busy.