These are quotes from The Inner Chamber by Andrew Murray on Moses the man of prayer.
Moses’ Prayers—In Egypt, from his first call, Moses prayed. He asked God what he was to say to the people, Exodus 3:11-13. He told Him all his weakness, and besought Him to be relieved of his mission, 4:1-13. When the people reproached him that their burdens were increased, he went and told God, 5:22, and he made known to Him all his fears, 6:12. This was his first training. Out of this was born his power in prayer when, time after time, Pharaoh asked him to entreat the Lord for him, and deliverance came at Moses’ request (8:8-9, 12,etc)
Think of the place God had in Moses’ life, as the God who had sent him, the God to whom he was totally devoted, the God who had promised to be with him, and who would and did always help him when he prayed.
Now for the practical application: How to learn to pray like Moses? We cannot secure this grace by an act of the will. Out first lesson must be the sense of impotence. Then grace will work it in us, slowly and surely, if we give ourselves into its training. But though the training will be gradual, there is one thing that can be done at once. We can at once decide to give ourselves to this life and take up the right position. Do this now. Take the decision, to LIVE ENTIRELY TO BE A CHANNEL FOR GOD’S BLESSING TO FLOW THROUGH YOU TO THE WORLD. TAKE THE STEP. If need be, take ten minutes for deliberate thought. Accept the Divine appointment, and take up some object of intercession.