I think the big thing for the limited knowledge I have is bounce. I know I had my mikes and my guitar facing a wood door on my closet when I was recording. After talking with Will, I put a mattress against the door and my sound recording go a whole lot better. I think just watching where you setup in the room will make a heck of a lot of difference. Don't bounce the sound off a door or window. I like the big curtain idea also.