Acrostic Psalms, as I define them, do not necessarily follow the traditional meaning of "psalm" as "a praise and worship song or hymn." Neither do they follow the rhyme or rhythm standards normally associated with traditional Western poetry.
For my purposes, I define an Acrostic Psalm as a verse in which the first letter of each line when taken together spell a word; and the verse when read describes or defines the spiritual nature or influence of the word.
For a deeper explanation, read my HubPage on Acrostic Psalms
I have written many Acrostic Psalms and intend to put them in a book. If you would like to try your hand at writing an Acrostic Psalm and perhaps have it included in the book, email me or use the form at the bottom of the page.