I have the same problem. It's annoying, but I figure I'll appreciate looking younger in a couple of years.
Try for a more polished look, both makeup and clothes. Like, tailored, well-fitting clothes, without going overboard on trends. Maybe throw in a trendy accessory or two for some flair. Generally... Pants/trousers > jeans. Blouses and camis > t-shirts and tank tops. Natural fabrics (wool, cotton, etc) > synthetics. Fitted jackets, or even large scarves or wraps for warmth. Scarves in general are great, actually. The blouses, especially, seem to do the trick for me, even if they're $10 ones from H&M (just make sure they fit well!).
I recall reading somewhere that cool colors make you look older, while warm ones make you look younger/fresher. Don't know how true this is-- I think more neutral, subdued colors generally read "older" than brights or heavy eyeliner. Lipstick > lipgloss usually reads older as well. hth!