David Powlison is a Christian counsellor. In the video below he talks about gratitude as an antidote to grumbling, and about the pastoral value of the General Thanksgiving from the Book of Common Prayer, which begins as follows:
Almighty God, Father of all mercies, we thine unworthy servants do give thee most humble and hearty thanks for all thy goodness and loving-kindness to us and to all men. We bless thee for our creation, preservation, and all the blessings of this life; but above all for thine inestimable love in the redemption of the world by our Lord Jesus Christ, for the means of grace, and for the hope of glory.
(Hat tip: Jake Belder.)