Denise, you've mentioned something that is an issue for me, that I had never even connected to the jawline issue -- periodontal disease. Despite the fact that I am religious about brushing and flossing, my gums seem to be prone to these issues (I'm pretty sure I inherited that from my dad -- he lost most of his real teeth at an alarmingly young age, but he also grew up in the 1930s in a poor family with a lot of siblings, so no dental care like we have today!). I may need to have some gum surfer done this year to treat a couple of areas where the problems are recurring, after 7 years of holding the problems at bay from when they were first diagnosed. Of course, my health comes before vanity, so I wouldn't have any kind of cosmetic procedure until I have these more pressing issues addressed.
I have also adopted a habit of holding my face in at least a bit of a smile at most times when I'm out in public. I think it actually doesn't look so much like I'm smiling as it does just having a halfway neutral-to-pleasant expression on my face. Even when I'm smiling with my lips closed, it tends to look like a smirk because of the asymmetry in my face. So who knows, maybe I just look smug then?
I'll confess, I am quite emotionally invested in the fact that I FEEL younger than I am, and some of that translates to me wanting to LOOK younger than I am. I know that many of you embrace looking your age, whatever that age may be, and I hope to achieve that peace someday.