FULL DISCLOSURE: This may or may not have happened to me a couple months ago.
1. Realize that something's wrong with your WIP. Something big. Something you can't ignore.
2. Spend hours trying to figure out what it is.
5. Stop writing.
6. Get cranky.
7. Pretend you're happier not writing.
8. Repeat steps 2 through 7.
9. Profess to your critique partner that you're totally ok with never writing again.
10. In response to your CP's skepticism, begin to vent about why you hate your WIP.
11. Argue that all your fixing ideas don't work.
12. At your CP's urging, list all of your terrible, horrible, no-good, very-bad ideas.
12. Insist that, no, that one idea that sounds like it could work really doesn't work.
13. No, it really doesn't.
14. Ok, it could, but what about ...
15. Alright, maybe it does, but it goes against this one thing that you thought was really important.
16. Realize that that one important thing doesn't actually matter at all.
17. Scoff at the idea that you've suspected the solution the whole time but were just too stubborn to see it.
18. Secretly try really, really hard not to smile.
19. Let a teeny corner of your mouth curl up.
21. Try to poke a hole in the solution.
22. Confirm there's no hole.
23. Poke again, just to be sure. Nada.
24. Finally allow that gigantic cheeser of a grin to spread across your face.
25. Get back to writing.