When I have a bunch of topics that I want to write about, I just write down a bulleted list of them in my writing notebook, in order by preference. So I put the topic I most want to write about at the top as number one, and the topic I least want to write about at the bottom as number 10, i.e.
Then I just slowly work my way through that list of topics, writing a poem about one topic and then crossing it off and moving on to another topic.
Best of luck! :)