One can never forget everything, what you can do is take some time off form your work, set it aside, start something else and after 3 moths pick it up and re-read it, make your 'edits' or what not to improve it then. One always improves ones own writing if takes a step back. You can't honestly ever give yourself an unbiased feedback, you either like what you wrote or didn't and even if you liked it' then there just two more branches on both those options - either you improve/re-write/edit or you don't.
I took time off from writing my main novels and started re-writing The Divide United; 5 chapters turned into 12... And It has improved quite a bit from the original rough writings I had of it in an old journal. I've since stepped back again... Don't know why since still was on a roll, but got distracted (I guess) b other ideas that were irrelevant with The Divide United so started penning those down just so that it doesn't influence The Divide United (That is in a possibly negative way)
So yeah... I can still recall my very first poem I ever wrote for English Grade 6 (that's back in 2006) it was a short and childish poem and it basically went as such:
"Who goes there?
Who creeps at night?
Is it the black cat
that watches over dusk?
Is it the black rose
glimmering in the midnight moon?
is it the black butterfly
keeper of dawn?
Who goes there?
Who creeps at night?
OR something like that; think the words are definitely different but that was the idea of the poem.
I don't even have the written piece anymore, think it might be up on fictionpress though... Can't remember if deleted it from there yet or not...