Psalms 77:11 - Ellicott's Commentary On The Whole Bible

I will remember. — The written text is, “I will celebrate.” The intention is the same in both cases. Instead of continuing to despair, the poet resolves on seeking encouragement for his faith in grateful praise of God for past mercies, and especially for the ancient deliverance from Egypt, which occupies the prominent place in his thoughts; “works” and “wonders” should be in the singular, referring to this one mighty deliverance.