"Whether you turn to the right or to the left, your ears will hear a voice behind you, saying, 'This is the way; walk in it.' " ~Isaiah 30:21
It has helped me to realize that no matter what I do, God will use my decision and He will still accomplish His will. That prayer is still important is true, but when I don't always get an answer and the choice is between Good Choice A and Good Choice B, and I pick A instead of B, I don't have to worry over whether or not it was right...God will use it anyway. So that's good, and it helps a lot.
Psalms
"I will sing to the Lord, for He has been good to me." ~13:6
"For Thou dost light my lamp; the Lord my God illumines my darkness." ~18:28
"My times are in Your hands." ~31:15
"Delight yourself in the Lord, and He will give you the desires of your heart." ~37:4
"Be still, and know that I am God." ~46:10
"For the Lord God is a sun." ~84:11
"The unfolding of your words gives light." ~119:130
"I life my eyes to the hills--where does my help come from? My help comes from the Lord, the Maker of heaven and earth...the Lord will watch over your coming and your going both now and forevermore." ~121:1-2,8
"The Lord will fulfill His purpose for me." ~138:8
"...even the darkness will not be dark to you; the night will shine like the day, for darkness is as light to you." ~139:12
"...my soul thirsts for you like a parched land." ~143:6