I've tried to write a short story many times before and have never been able to write anything good. Aside from the fact that I need to improve the way I tell my story, the main issue for me is a complete lack of any content whatsoever. All the key elements of a a story - plot, setting, conflict, character, etc - are the very elements I seemingly have no ability to create. I don't believe the problem is that I can never do it, but since I have lived most of my life watching television, playing video games, exploring the computer, and being stuck in the hospital and in programs, I have no imagination at my disposal through which I can pour out ideas. Now the thing is, I don't want to write common things that I know; I want to write fantasy. I want to make up new things altogether. How can I improve my imagination so that I can write such things?