When I was young I took part in a lot of weekday groups in a Christian church (rural Ontario, pretty much the mode out there at that time). One of our regular practices was being rewarded for perfectly memorizing passages. I recall being able to recite entire chapters, and soon entire books after practice. I ended up doing some acting as a kid and had no difficult time memorizing scripts after all of that.
But later in my high school years and into university I loved poetry, and tried to keep a few favourites in memory (and still do) because they inevitably become relevant at some point, and I find it a comfort.
Just find something you enjoy reading first off. The technicals of craft are arbitrary if you enjoy it. If you don't read much poetry and ever want suggestions, I'd love to contribute!
Do like most people these days: learn song lyrics! Songs are really poetry. Some have very deep meaning and good flow. Some will probably resonate with your own feelings.
Otherwise I have only bad recommendations in French, but I learned almost all of Cyrano de Bergerac's play and still remember maybe a third of it. In it, "La ballade du duel" flows very well and "la tirade des nez" is a classic that is a very good exercise.
I have no clue about English poetry. Despite having a decent written English level, I could never get into poetry in English. I think my pronunciation is not good enough and I have a hard time knowing how some more rare words, common in poetry, are actually pronounced. I would love to have the courage to get into Paradise Lost at one point.
I celebrate myself,
And what I assume you shall assume,
For every atom belonging to me as good belongs to you.
whitman essentially only wrote one book: leaves of grass; with one poem: song of myself; but revised, reordered, and rewrote the book multiple times from 1855 to 1892
EXCELSIOR.
WHO has gone farthest? for I would go farther,
And who has been just? for I would be the most just person of
the earth,
And who most cautious? for I would be more cautious,
And who has been happiest? O I think it is I—I think no one
was ever happier than I,
And who has lavish'd all? for I lavish constantly the best I have,
And who proudest? for I think I have reason to be the proudest
son alive—for I am the son of the brawny and tall-topt
city,
And who has been bold and true? for I would be the boldest and
truest being of the universe,
And who benevolent? for I would show more benevolence than
all the rest,
And who has receiv'd the love of the most friends? for I know
what it is to receive the passionate love of many friends,
And who possesses a perfect and enamour'd body? for I do not
believe any one possesses a more perfect or enamour'd
body than mine,
And who thinks the amplest thoughts? for I would surround those
thoughts,
And who has made hymns fit for the earth? for I am mad with de-
vouring ecstasy to make joyous hymns for the whole earth.
You can also try starting with an author whose themes or circumstances evoke a strong emotional response in your mind. This is likely to be more effective at getting you hooked in comparison to a text that provides a general introduction. In my case, it was Wilfred Owen who provided the initial spark.
> What has happened to the lost art of memorising poems? Why do we no longer feel that it is necessary to know the most enduring, beautiful poems in the English language 'by heart'? In his introduction Ted Hughes explains how we can overcome the problem by using a memory system that becomes easier the more frequently it is practised. The collected 101 poems are both personal favourites and particularly well-suited to the method Hughes demonstrates. Spanning four centuries, ranging from Shakespeare and Keats through to Thomas Hardy and Seamus Heaney, By Heart offers the reader a 'mental gymnasium' in which the memory can be exercised and trained in the most pleasurable way. Some poems will be more of a challenge than others, but all will be treasured once they have become part of the memory bank.
I'd add that if you want to understand what's going on within a poem you might find The Ode Less Travelled by Stephen Fry useful.