The blog author is a priest looking for stories 300 to 1000 words long. That means you must tighten up your length and make every word count. While doing the practice critique list at The Internet Writing Workshop I learned a lot about using active verbs and cutting out extra words, because you are only allowed to submit very short pieces to that particular list.
Poetry is good source of inspiration. Poets know how to choose the one right word to say much.
Don't drive under falling cows; check out Catholic Flash Fiction. Read a story. Write a story. ;)