Sorry this is a bit late being told to you all, but I only just found it and there's still 24 hours.
Tomorrow there's a pitching event, being held on twitter. Pitch your completed manuscript (fiction) or non-fiction book in 280 characters or fewer. Agents (mostly from the US it seems) have been on previous ones and you're trying to grab their attention and get an invitation to send your query letter, synopsis etc depending on what they want. It's from 8-8 East America time zone, which I think is 1pm-1am for those of us in the UK. It's a short-cut to the top of the slush pile but no more than that.
There are workshop type threads to work on punchy attention-grabbing pitches - your main character, the conflict and stakes. That's on a private FB group. I think the twitter bit doesn't require you to have done that work, but you need the hashtags to get found.
As far as I can tell there's no hard sell going on and only the lightest soft-sell (and I'm watching for it coz I'm suspicious like that).
They seem to happen several times a year if you don;t have time right now.
LINKFB
link to PitchWars site with hastags to use and stuff:
pitchwars.org/pitmad/