Well, we learned about drabbles a while ago when I had my contest. But I will explain again. Drabbles are stories of exactly 100 words. They are an excellent exercise for learning brevity.
Here's an example of one I wrote.
In his dream he saw a man chained to a wall in a room. The man was being bricked into the room. He could hear the slap of mortar and brick. He felt he knew the man and tried to speak to him, but his mouth was a desert and his words were silent dust.
With each brick the light grew dimmer until, as the last brick was put into place, he awoke gasping for air.
He awoke into a well of darkness, his wrists chained to a wall, his mouth a desert, his scream a silent falling of dust.
Mini-sags are shorts stories of 50 to 60 words.
Or you can write a story in one to three sentences.
Harder still, write a story in 6 words. "I came, I saw, I conquered."
(Please note the only example I give is not an original. LOL)