Dreams, but what about flashbacks? I have only four flashbacks in my story, all are within the first forty pages to "show" the backstory (why the MC's are together and in love, why he was sent away etc.). I had started my story with these events, but everyone said they didn't work as an opening, so I get my MC on the boat, where we get hints at as to why he is there during his boarding and induction, then the flashbacks later on weaved in-between the action and cliffhangers. Everyone says it now works.
I just watched the Glass Union, the sequel to Knives Out, and there was the one big flashback that threw me at first, but made sense.
No quotation marks: I read the Lincoln highway and it threw me off at first. I just read James Joyce's Portrait of an Artist as a Young man (to get ready for our trip to Ireland in April) and he didn't use quotation marks.
Now I'm worried about timelines. I go back and forth between my two MC's, to show cliffhangers etc. If I did ten chapters with one MC, then ten chapters with the other, it wouldn't be as dramatic and cliffhang. So far, everyone who has read the entire manuscript, has said it works for them.