Write flash fiction. Flash fiction means very short stories, often no more than 100 words. Writing a flash fiction story will help you become more creative as you'll be forced to tell a fleshed out story with a beginning, middle, and end using only a small number of words. This will help you learn how to convey necessary information in a limited space. There are many flash fiction writing communities online. Try getting involved with a flash fiction writing community and responding to prompts and participating in contests.