I have a suede sectional, and on the side with the fold-out bed, the couch cushions feel like they are sunk in. Whenever you are sitting on them it's like your butt is lower than your knees, so it's hard to stand back up off of it.

I will sometimes sit on a pillow to make it a more level seating surface, but I'd like to have a more overall boost to that whole side of the couch. What can I use?