If I knew the answer to that I wouldn't be trolling the internet all night XD

Personally I like to have several different kinds of fanfiction on the go at once. That way if I'm in the mood for angst I can write the angst story, if I'm in the mood for funny I can write the funny story.

If you can't write Jooster right now, try writing anything at all. Do a mini one-shot of something else. Don't try to make it good - it's not for publication after all.

Of course if it does turn out good then you'll have another story under your belt :)