Jeremiah 31:33 "But this is the new covenant I will make with the people of Isreal on that day." says the Lord. "I will put my instructions deep within them, and I will write them on their heearts. I will be their God, and they will be my people."
God tells us right here that his instructions are written on our heart... to follow God one thing we can do is follow our heart... our body tells us when we do something wrong, or are about to do something we shouldn't ... we need to listen to our bodies... this is a good step towards doing what God ask of us... if you body tells you no, listen... that is God's word nudging you to do the right thing.