No work on DD yesterday, but I did rewrite section 4 of IS.

Once again, I'm supposed to have a great day. Given how normal most of my recently-predicted 'great days' have been, I'll take this with a grain of salt.
As far as your work is concerned, today may well be the day where you get the green light for something you have been waiting for...an issue is being resolved, you are gaining acceptance. Who knows, there might even be a promotion on the cards. But most definitely, your situation will be more secure.

Talked last night with a friend about what gets a book sold (someone who's also getting no love from agents).

I think there are 5 contributing factors, and one need not have all five to break through:
1) Talent
2) Perseverance
3) Marketability (like being a sixteen-year-old, or recently dead, or having talked to a Presidential candidate)
4) Knowing the right people
5) Luck (the editor/agent doesn't spill coffee on their pants and use your query to mop it up.)

Any other thoughts that don't fit into that list of 5?