Late to this thread, apologies, but wanted to add my two cents' worth.
The things I wish I'd done/discovered sooner:
LASER HAIR REMOVAL FOR LEGS. When I think of the years - YEARS - I sweltered all summer long because no matter how I epilated my legs, waxing, shaving, you name it, I was a mess of ingrowns and red angry-looking rashes. Couldn't wear a skirt, shorts, anything, because my legs looked horrendous. I finally splurged on laser hair removal 2 years ago at age 40 and have spent the past two summers actually feeling COOL for once. My legs are still pale, I've never cracked the fake tan thing, but I don't really care. They are SMOOTH and not red/bumpy and I wish I'd done it 10 years ago.
HOT CLOTH/BALM CLEANSING. I switched from a gentle foaming cleanser to Emma Hardie balm 3 years ago and my skin is approx 1 million times better for it.
SUDACREME FOR SPOTS!! As recommended on here, thank you kindly MN! Started it when my period was due last week and all the usual bumpy horrors just de-swelled (is that a word?!) overnight. Half the size by morning, and trust me, the PMS spots I get, huge under the skin ones, are NOT dealt with lightly. Nothing else has ever worked like good old Sudacreme.
And finally - Cutting down on sugar as much as possible. Best single anti-ageing thing I've ever done. I did it 2 years ago for other health-related reasons and my skin was glowing, as opposed to grey and puffy, about a week later. These days I can see in my skin after a couple of days when I've had too much sugar again.
Great thread, have taken loads of tips off it, thanks!! Hope my input adds something...