When writing people thank you notes for presents, greet them by name, say thank you for the specific gifts they have given you and praise the gifts. End the notes by expressing warm wishes or messages of good will, and then add your regards and personal signature.
Write "Dear" before the names of people you want to thank. While thanking people for their gifts, include how receiving them made you feel and explain how you are going to use them to show you appreciate them. You can also thank people for the time and effort they put into choosing their gifts for you. Writing "Sincerely" before your ending signature is an appropriate way to give your regards to anybody, but you may want to be more personal with loved ones and write "With love."