Give your whole heart by laying down yourself, purely and holy unto Him.
In the scriptures, it is said to deny yourself and pick up the cross every single day.
In order to give all of yourself, you must sacrifice your desires in order to love and honor His. 

Mark 12:30
“Love the Lord your God with all your heart and with all your soul and with all your mind and with all your strength.” 

Give Him everything. Everything. Not half of heart, not 99.9%, but all of it. He is more than deserving.