Be thankful for your silent benefactors and supporters, who encourage and sustain you. Not everyone has the desire to be publicly acknowledged or praised.
Be thankful for the opportunities and lessons that keep (re)presenting themselves to you. Listen and observe, for they bear the truth. besides, not everyone is so lucky as you. Some had only one chance, and that was it.
Be thankful to yourself for choosing the journey you are on right now. Some never had the chance to choose, and some others had theirs snatched away from them.