Pray that God would prepare your heart, and that He will take you beyond where you are currently to an even more living and vibrant experience with Jesus.  Pray each day.  Choose what you will fast from during this 40 days.  Fasting something (a meal, snacks, television, social media, shopping, etc) will draw you closer to Jesus.  Read Psalm 51:10 Recite this verse as much as possible today.  Write it down.  Try to memorize it.