This was taken from a Hazelden publication, who does a lot of literature for AA and Alanon. When I'm having bad days, I try to focus on this concept.
There are two days in every week about which we should not worry,
Two days which should be kept free from fear and apprehension.
One of these days is YESTERDAY
With its mistakes and cares, its faults and blunders, its aches and pains. Yesterday has passed ...