Agree with the steamer and the eyebrows done!Personally, for me....
Non-wrinkled clothes can very easily take you from messy to dressy! I swear by my steamer!
Manicured nails and toes. I live in Florida, so I there are quite a bit of people that wear flip flops 24/7 (my BF being the #1 offender of that), but I think a nice pair of heels can easily take your outfit to the next level. Speaking of heels - to not wear shoes that show excessive wear and tear. I know we all have that favorite pair of go-to shoes, but when it looks like your shoes have walked a thousand miles and back or your dog got ahold of one of the stilettos for an afternoon snack, it can make an outfit look a little less well put together. My rule of thumb, is that when a pair of shoes start seeing serious scuffs or a little too much wear for my liking, I put them in the donate bunch.
Makeup: I think simple makeup is key. Some mascara, maybe a lip tint or natural color, some blush/hi-lighter. And don't forget those brows! I have mine microbladed, so I don't have to fill them in every morning anymore, but having my eyebrows perfectly how I like them already makes me feel more attractive.
Clothes: I think everyone should express themselves while still dressing age appropriately. Personally, I don't like snug fit, body con clothes anymore. So, those all got donated long ago... but I always feel most put together when I'm wearing a knee-length, flowy dress or nice pants and a blouse... and don't forget the heels!
And I wanted to make an edit to this...Since I know we have ladies (and gentlemen) of varying age groups that contribute to these posts! By "heels" I don't necessarily mean stilettos. It can also be a nice loafer or flat. I just said heels, b/c that's what I usually gravitate towards. I just think a nice, classy shoe that suits your lifestyle! And keep the flip flops at the pool or beach, please lol
Concerning the flip flops we don’t have that issue here

Good points with the shoes not too worn out. And to me leather shoes will always be a big part in looking classy (rather than pleather or sneakers) where it’s worth investing a minimum in quality.