I think I know what you mean. Your question hints at the ol' infodump concept, yeah? My particular writing style is very minimalist and quick-paced. I generally have the whole novel "written" and then go back to add background information if it's needed. I have found that if I write the characters as if my audience already knows what I'm talking about that most of the relevant background info falls in to place organically throughout the story. Does that make sense? After I've written a first draft I'll let my betas go over it and tell me if something is confusing or not explained enough. Then I'll add it in.
I'm a big believer in the high intellect of my readers; most likely they'll figure everything out that they need to figure out about my characters and what drives them. Write strong characters to push this.
Barring that very obscure advice, I find that if it takes me more than a four or five sentece paragraph to explain something then I'm explaining too much.
FYI: I despise dream sequences, flashbacks, excessive monologues, and all those types of devices writers use when they think they're being sly about slipping us (the reader) info. But that's just me.
I hope this was helpful, but I'm on Sudafed right now so it may make no sense whatsoever.
Cheers!