Thanksgiving is one of the commandments of God, for all he had done for us:
In Psalms 100:4 we are taught to:
Enter into his gates with thanksgiving, and into his courts with praise: be thankful unto him, and bless his name.
Christ, himself, was are the ways to shows thanksgiving to God:
1).Remember Him
The first way to show true thanksgiving to God is to always remember Him. Remembering Him means that He is a part of our thoughts, words, and deeds. It is impossible to give gratitude to God if we never think or speak of Him. When we remember Him we are choosing to think, speak, and act as He would have us do. We can also memorize scriptures and quotes on gratitude to help us remember to give thanksgiving to God.
2)Recognize His Hand
To give thanksgiving unto God we must recognize His hand in our lives. What blessings has he given to you? A great idea is to get out a piece of paper (or open a new document) and number your blessings one by one.
As you count your blessings, be specific. Name individual family members and friends. Think of your life, health, home, city, and country. Ask yourself what, exactly, about your home or country is a blessing? How about your skills, talents, education, and job? Think about those times that seemed like a coincidence; did you overlook God's hand in your life? Did you think of God's greatest gift, His Son, Jesus Christ?
You will be amazed at how many blessings you truly have. Now you can show thanksgiving to God for them.
3)Give Thanksgiving in Prayer
One way of showing our thanksgiving to God is through prayer. Elder Robert D. Hales of the Quorum of the Twelve Apostles said it most eloquently:
Prayer is an essential part of conveying appreciation to our Heavenly Father. He awaits our expressions of gratefulness each morning and night in sincere, simple prayer from our hearts for our many blessings, gifts, and talents.
Through expression of prayerful gratitude and thanksgiving, we show our dependence upon a higher source of wisdom and knowledge.... We are taught to 'live in thanksgiving daily.' ( Alma 34:38)
4)Repent of Sins
Repentance alone is an amazing blessing for which we should give thanksgiving to God, yet it is one of the most powerful ways in which we can show unto Him our gratitude.