i don't claim to be a very good poet but i do dabble in the genre and i've taken a few creative writing classes and read a few writing books. here's some exercises/ i've done over the years that might prove to be helpful!

•make a list of happy images (or sad ones, or angry ones, whatever emotion you please. ) you can choose one of these to further expand on or you can just keep this list in your back pocket for when you may need it later.
•ea deverell has some great writing worksheets for writing novels but i find this metaphors and smilies worksheet really useful for poetry.
•make a list of opposites, things that contradict each other. these can come in handy when you want to create a certain image.
•write something aural. write with the intention/goal that all of your words will sound good spoken out loud.
•write something inspired by a piece of music.
•write something inspired by a painting.
•and one of my favorite exercises was a jargon exercise. you take specific jargon, like medical terminology or i used spy jargon, and create a poem out of it. i still have my piece if you want or need an example.

some things to keep in mind/things to try to do whilst writing:
•alliterate
•have concrete imagery
•connect things in unconventional ways
•play on words
•have a theme. for this poem, the prompt was sing so i used a lot of musical imagery and vocabulary. play, harpsichord, singing, crescendo, fortissimo, etc!

•i also find other people's poetry to be a great source of inspiration. i have some quote and poetry tags you might want to peruse here and here. and lifeinpoetry posts a lot of beautiful quotes from poems.

•and of course, there's also always prose poetry! ;)

i hope this helps you at least a little bit, sorry it got so long!