There are a number of different ways to say thank you. You can vary the expressions you use, such as "thank you very much" or "thanks a lot," or you can not use words at all, but rather give a gift or use some other non-verbal expression.
Some additional expressions of thanks are "thanks a million," "thanks a ton," "please accept my gratitude," "I truly appreciate you" and "I am forever grateful."
If you want to go beyond words, say thank you by making a gift bag filled with something meaningful to the recipient. Attach a note or a custom label. Another way to show your thanks is by making homemade goodies, such as cookies or candies. Putting together a flower or fruit basket and attaching a thank you note is an excellent way to express gratitude, as is paying it forward to your friend's favorite cause. Other ways to say thank you are cooking a special dinner for the person you want to thank or helping that person with something he or she might need.
Ways to say "thank you" in the top five most widely-spoken languages other than English are "xie xie" in Mandarin, "gracias" in Spanish, "shukriya" in Hindi, "shukran" in Arabic and "dhanyabad in Bengali.