Hearing God

"My sheep hear my voice, and I know them, and they follow Me;" John 10:27 (NAS)
Hearing from the Lord takes practice, though it's easier if you already function habitually in proper respect for authority.  Psalm 139:23-24 is a helpful prayer to start with when you're asking God for answers:
"Search me, O God, and know my heart;
Try me and know my anxious thoughts;
And see if there be any hurtful way in me,
And lead me in the everlasting way."  (NAS)
Am I living in humility and gratitude daily, or did I just show up to ask a quick favor?
Do I really want to hear from God, or do I just want to feel justified while I do what I want?
If the Lord says something I don't want to hear, am I prepared to listen to Him anyway?
Am I obedient in areas that seem insignificant, doing what's right even when no one will know?  In other words, why would He give me important instructions if I've been disregarding small details?
Do I truly desire His will to be done, or do I just want His will to be mine?
Is what I think I'm hearing from Him in line with what the Bible teaches?
Am I making a decision in faith or in fear?
Have I taken time to listen carefully?
As you read the Bible daily, talk with (not just to) God throughout the day, and get regular input from godly people, God's voice becomes more clear.  I find that when I don't hear a straightforward answer after praying about a specific fork in the road, that it's simply my choice to make.  Perhaps either job offer is the right one in which to represent Him.
"You will seek Me and find Me when you search for Me with all your heart."  Jeremiah 29:13 (NAS)