Absolutely, just dressing differently and changing a few things has helped. Facial hair is a big one. I'd rather look young than be balding at 23 like some of my peers.
Right!? I found dressing “older” actually made me look younger. It looked like I was pretending to be grown up. I kind of embraced a rock/slacker look in my 20s and that worked best. These days I just do the dad look. That works fine. Best of luck out there!