How can you say "THANK YOU" to GOD?

The Bible tells us to “always give thanks to God the Father for everything” (Ephesian 5:20). But what does that really mean—are we expected to literally say prayers of thanks to God as we go through the day? Prayer is a wonderful way to thank God… but what if there was a more tangible way to express our gratitude?
The Bible makes it clear that there is such a way: through service to others. You may have heard the quote, “whatever you did for one of the least of these brothers of mine, you did for me”—that means that when we do acts of service and kindness for others, it’s as if we are doing them for God himself.
That kind of selfless service is a great way not only to make the world a better place, but to show God our thankfulness.

May the LORD now show you kindness and faithfulness, and I too will show you the same favor because you have done this.2 Samuel 2:5-7

Meditation on the Law

Let my cry come near before thee, O LORD: give me understanding according to thy word.

Let my supplication come before thee: deliver me according to thy word.

My lips shall utter praise, when thou hast taught me thy statutes.

My tongue shall speak of thy word: for all thy commandments are righteousness.

Let thine hand help me; for I have chosen thy precepts.

I have longed for thy salvation, O LORD; and thy law is my delight.

Let my soul live, and it shall praise thee; and let thy judgments help me.

I have gone astray like a lost sheep; seek thy servant; for I do not forget thy commandments.

PSALM 119

Trust in the LORD with all thine heart; and lean not unto thine own understanding. In all thy ways acknowledge him, and he shall direct thy path.

PROVERBS 3:5

Wisdom is the principal thing therfore get wisdom: and with all thy getting get understanding.

PROVERBS 4:7

Every word of GOD is pure: he is a shield unto them that put their trust in him.

PROVERBS 30:5