I am working on a commentary on the Psalms. I have decided to compile some helpful links that I discovered during my research. It includes a mix of exegetical and sermonic links. Here is what I have for Psalm 71 (in no particular order). Feel free to mention any that you find helpful in the comments section.
Michael Easley Sermon: https://immanuelbible.church/resource/sermons/message/reflecting-on-aging
Analysis by C. J. Labuschagne: https://www.labuschagne.nl/ps071.pdf
Eric Mathis: https://www.workingpreacher.org/preaching.aspx?commentary_id=2753
William Barrick’s notes: https://drbarrick.org/files/studynotes/Psalms/Ps_071.pdf
John Piper, The Prayer of an Old Saint: https://www.desiringgod.org/messages/the-prayer-of-an-old-saint
Psalm 71 devotional: https://www.generations.org/devotionals/84