Being thankful is not an art, or a cliche' but rather a condition that is manifested in a heart when a true view of self and condition are realized. Oh to realize our unworthiness that we may melt in thanksgiving unto God.
Please enjoy the following verse find in your KJV:
Let us come before his presence with thanksgiving, and make a joyful noise unto him with psalms.
Enter into his gates with thanksgiving , and into his courts with praise : be thankful unto him, and bless his name.
Sing unto the LORD with thanksgiving; sing praise upon the harp unto our God.
Continue in prayer; and watch in the same with thanksgiving: