They were helped in fighting them, and God handed the Hagrites and all their allies over to them, because they cried out to him during the battle. He answered their prayers, because they trusted in him.
1 Chronicles 5:20 NIV
The key to "success" is trusting in the Lord. See also Proverbs 3:5-12. When our eyes are on Him, he will answer our prayers.
Trust in the Lord and cry out to Him with my requests.
Lord, I love you and do trust in You. Please help me keep my focus and not get distracted. Thank you for being with me, for strengthening, comforting, teaching, leading, and revealing Yourself to me. I love you!