Over time, couch cushions can start to get a little droopy and sad. You can perk them back up again by adding some extra fluff to the inside of each cushion.
Your cushions and pillows will start to sag for a couple of reasons: they slowly soak up moisture and the stuffing gets displaced over time. If a little sun bathing isn't enough to fluff those things up, you might have to add more stuffing inside.
Tonya at the Love of Family and Home Blog suggests plumping the back cushions back up with some Poly-Fil polyester fibre and some quilt batting for the cushions you sit on. It won't cost you very much, and after that your couch should look like new.
Of course, this only works for couches that allow you to unzip the cushions. To learn more about the process, check out the link below.