In no particular order:
I am thankful that, despite the bungling of my youth, I somehow ended up with my good and beloved wife, and that we are growing old together.
I am thankful I still have faith in God, who sustains me in spite of myself.
I am thankful my old father is still with me.
I am thankful to be a free man in a free society.
I'm thankful 17 year olds can't vote.
I'm thankful for the light of a single candle.