Don't give up. Even if it's hard, and you're struggling to write down anything of note, don't give in. Creativity is like a wave, sometimes it's crashing over you and overloading your brain, sometimes it's calm and you can't make anything of it. You've just got to push through, clear your mind...
Almost all of my original work on this site barely gets past the set up phase, and even if I'm lucky enough to get three or four people to post character sheets, it'll surely fizzle out once I get tired of reminding people that they are supposed to post. After maybe my fifth attempt trying to...