I find it impossible to do automatic-writing without having something of note happen! Even if no great feat or specific desire is chosen, what is written will at least show what the unconscious has to say, or perhaps...
something else 
Paychologically it's a sound way to bridge the way towards your wellspring of unconconscuous creativity!
I haven't experimented much with automatic writing past empty minded observational speculative analysis on things, events, metaphysics, etc that usually have a meaty reward that's sometimes too much to swallow, but the act of allowing fate to guide my hands is something I
do to use Tarot & I-Ching. Thinking on it, it's the same thing, just cards instead of a pen. There is a question and an answer is "drawn out" through the cards.
Okay, is this thing on? Cause I wanna be heard in Brag-City

I have had a 100% success rate on myself and many other people around campus, usually very specific context lines up with the cards, or something genuinely meaningful / relevant can be gotten without fail. I have been waiting with baited breath for the day the readings shit; some kid asked the I-Ching how to get ahead in his Math class and I swear to God it answered earnestly.
I do nothing, first a few breaths, then a ritual to "connect" with the deck. The person asks their question - with me having told them of my 100% success rate, greasing the wheels - and I shuffle unconsciously. Then I divide the deck by asking questions like "black or white" "Justice or Mercy" "Sun or Moon" etc. The process really gets the readee involved, but everything on my end is automatic without my input, it's like purposeful disassociation, blind faith my hands will do what they must to get the right cards.
Then with faith, I just read the descriptions of the cards and add my own understanding, and reliably it fucking works. The reading and interpretation itself is also automatic.
I believe it is a sort of "channeling" but instead of Toopie from Andromeda its interracting with the simulation as a whole, allowing Fate to say its peace.