Our pastor had a great message yesterday, taken from II Timothy (I belive). It was "In all circumstances, give thanks."
Nor 'for' all things, 'in'.
That thankful people are positive.
That if you appreciate something, you will not so easily discard it.
That if you feel you deserve something, you will not be thankful for what you already have.
So, regardless of what you're going through or where you are at, give thanks.