I agree with Nice & Wavy. You have to spend time getting to know Him. You also have to be honest with God and this may seem easy but it is hard because we already know that God knows all so we don't feel the need to share everything with Him verbally because he "knows our heart". Well in the Bible God asked Adam and Eve where they were when they disobeyed Him and He already knew. When Cain killed Abel God asked Cain where was his brother and Abel's blood has already cried out to Him. God knows all but He does not want you to keep secrets from Him because when you do you give the enemy a chance to tempt you. God tests, the evil one tempts.
You also have to praise God even when you are angry with Him or you don't understand why God is letting bad things happen to you. I've taken something that my mom said to me once when I was a child when we were watching a sports player being interviewed by reporters. The man had an attitude and didn't want to speak to them and she said that when everything was going alright he loved the camera and couldn't wait to show his teeth but as soon as things started to go wrong he shunned it. If you can show your teeth going up then you better be able to show your teeth going down. The point is, if you can praise Him when everything is seemingly going right and you call it a "blessing" then you better be ready to praise Him when things are seemingly going wrong and be ready to call that a "blessing" as well.
Another thing, I always thought that for some reason God would speak to me in a thought after a prayer or maybe a dream but I have come to realize that God speaks to us through scripture as well. Whenever I study His Word and let Him guide my lesson plan, He always shows me what I need to improve on. When you study God's Word He isn't showing you someone else so that you can judge them, He's showing you you!
Oh and one more thing, lol, this is maybe the hardest....You have to surrender and stop trying to control how God carries out His will through you. You can't say, "I'm willing to do what you want me to do as long as you don't have me do _________". This kept me away for a long time because I was too scared to learn what God had in store for me. My suggestion to you is start small. Maybe ask God to soften your heart so that you can be more receptive to Him and eventually you'll start to build more trust as He fortifies you for what He has in store.