Anyone got any sort of learning-to-write program I could follow?

I don't mean as in learning how to write kana or kanji; I mean as in how to express yourself in written Japanese.

I would consider myself an advanced learning, and have been reading books for a while now, but writing in Japanese is still the bane of me- I know I should just do it but the idea of writing a coherent piece by hand in japanese is so overwhealming I can't even get myself to start.

I'm thinking something akin to a creative-writing course, but that will help me build my writing skills from the ground up to long multi-page essays/presentations. Just something I can follow along and grind at every day during my study time.

Any recs?