This is a question to those who have braved through Amnesia whole. My friends and I haven't really gone further than the first 10 minutes of the game...multiple times. I think what might be helpful is if we (and this is a plan everyone is welcome to be a part of) did a game club for Dark Descent.
I did this a while back with books and doing a book club really helped me get through a good amount of literature. We'd decide on a page number or a chapter to stop at and progress slowly, but together. You can't really do that as easily with video games. And it's not like we can agree to play "for 30 minutes" because different people would progress faster/slower than others.
So perhaps some Amnesia veterans can suggest a list of ( 7? 10? 15? I don't know what would be a good number of) milestones. That way we, and everyone else who wants to do the 'game club' thing with this game, can just say "when we get to [specific room, moment, etc.], let's stop, save, and quit." Then next day continue on to the next milestone.
Please? And thank you :)