If it is a good thing to give thanks unto the Lord, that means it is a bad thing to be unthankful. If you are thoughtful, you will discover that there is always something to thank God for.
Read Psalm 100: 1-3
This entire psalm is a great song of praise, thanksgiving and worship that declares the goodness and mercy of God to all people.
Our God is faithful and true, and His grace extends to every nation of the world and all the twelve tribes of Israel – for ever and ever.
The word praise in the superscription is actually the word thanksgiving or more specifically, thank -offering. When we look up the word “thanks” in scripture, we find that the majority of the time it is used, it is preceded by “give.”
Psalm 100 was one psalm that always accompanied a “thank you offering” that a person presented when believing God for a major miracle like a vow, or whenever God had answered their prayer or given them a great deliverance.
That means, in the Bible, your testimony time must always be accompanied by a ‘thank you offering to the Lord.’ Word can be cheap, but actions speak louder. Faith without works is dead.
"And this is the law of the sacrifice of peace offerings, which he shall offer unto the Lord.
If he offer it for a thanksgiving, then he shall offer with the sacrifice of thanksgiving unleavened cakes mingled with oil, and unleavened wafers anointed with oil, and cakes mingled with oil, of fine flour, fried." (Leviticus 7:11-12)
If he offers it for a thanksgiving. —That is, acknowledgment of special mercies received from God, such as deliverance in travels, by land or sea, redemption from captivity, restoration to health, breakthrough etc. as enumerated in Psalms 107.
It is to this sacrifice that the apostle alludes when he says, “By him therefore let us offer the sacrifice of praise to God continually.” (see Hebrews 13:5)
If he offers it for a thanksgiving — The Hebrew word, gnal todah, refers to confession. That means thanksgiving involves an offering that is supposed to be accompanied with a public confession or acknowledgment of the mercies and deliverances which the offeror has received from God.