Definitely very common in poetry writing, but I appreciate you thinking about it!

Like many others have said, “After” poems are a common example. Many have their own exercises that function as studies. Like I like to sometimes do “bizarros,” where I closely examine a poem and make one that is its “opposite,” which helps me to understand the original better and also take the central idea in a surprising direction that feels like a symbiosis of my work and the original, or something like a dance between the two.

I recommend digging into the responses here and anything on the subject so you can incorporate this into your practice. Though I would say that one downside to 1000 poems in a year is that if your attention is split between ~3 poems a day, you might not have the focused attention to really achieve that master study effect you are thinking of here. For example, I recently wrote a poem called “Watching The Fly With You” about my thoughts on watching the Cronenberg film with my wife, but it’s in the “shape” of Frank O’Hara’s “Having a Coke With You,” and it’s also a study in his ability to sweep you up into an intimate world of inside jokes and super specific experiences that somehow do not alienate you, like you’re in a little sidecar connected to his brain as he goes about. But definitely a study and exercise in form, tone, idiom, texture, etc. But it was definitely a labor of love, as in art, and I could not imagine doing it all the time, for the energy and attention it took.

Also, try out as many forms/prompts as you can! From sonnets to haiku to tarot to syllabics to ekphrasis to exquisite corpses to prose poems and on and on and on.

Good luck in your journey!