How you say thank you depends on if you are saying it to someone or writing it in a letter or other type of communication. The best way is just to say the words directly to the person. It is often helpful to say what you are thanking them for. If you are writing it in a memo at work; then specify who you are thanking and for what task or action. In a thank you note be sure to include the gift
. (if applicable) or thank the host for the invite to the party. Make your thank you from the heart, be specific as to what you are thanking them for, and be sincere.