The best thing you can do to help your own writing is read lots of good poetry. Read the great poets of the past, and read a wide variety of the poetry being published today. Don't read just one kind of poetry. Stretch your imagination by reading both formal verse (poetry that uses rhyme and meter) and free verse. You'll be amazed how much your own writing improves as you expose yourself to the work of more experienced poets.
A couple of things you'll notice about good poetry:
Concrete images are better than abstractions. Instead of making statements about "love," "life," "truth," "justice," and so on, write about things that readers can see, hear, touch, taste, and smell.
Specific details are better than vague generalizations. Don't just tell your readers that a person is smart, brave, kind, etc.; show those traits in action. Don't just say that a scene is beautiful or peaceful or scary or whatever; give details that let the readers experience for themselves what it's like.