Ever heard the saying "fake it till you make it?" So even if its not perfectly natural to you, make a point of thanking GOD for something everyday. Thank GOD for those thing you Love but also for things you may not love all that much. Over time, you will find this will come naturally.
Realize that all things are from God. From your birth to your death, it is a gift from Him. Everything from the first sunrise to the last sunset is His work. Literally everything is from Him and nothing is spared when we consider everything. Your life was His before it was yours, and even so your spiritual rebirth is entirely a gift from Him. Your forgiveness is by His blood. Your sanctification is the working of His Spirit. There's nothing apart from God because He alone created everything. What is there to not be thankful for? For the very breath you draw in is created by Him. Every minute detail of this creation is written in His hand. What do you have that is not to be thankful for? You have nothing to which you or any man has created on His own, but all things through the Father alone exist for our use. Thank God for everything... He alone deserves all the glory and all the praise.
Trust God with all of your life. Know that God's nature is full of kindness towards you. Know God for who he really is - your friend & greatest confidant. Then you will have the satisfaction of truly knowing him, & he will have the joy of being known by you. Surely the thing we want most in life is to have someone who really knows & gets us. Is it any different for God?