When packing for one of our first trips, DJ had a list of things labeled "Toilet Trees". He knows that's not the proper spelling of all the gear one packs to deal with their body, but since then we've always referred to things like shampoo, conditioner, soap, etc. as Toilet Trees. Sometimes just "'Trees".
Given our carry-on only travel plans, the 'Trees need to be pretty light. They'll also have to be divided into liquid and non-liquid items.
First, the non-liquid items. Below is a combination of personal care items and first aid items, including two kinds of blister relief pads, Drammamine (in case DJ gets train-sick), probiotics (for me and my sometimes unpredictable GI tract), Tums, UTI pills (I haven't had one in a while, but I don't want to deal with that uncomfortableness in Europe), deodorant/ antiperspirant, two kinds of anti-chafe stuff (I'm packing skirts and want to wear them to walk around in without having the "OMFG OUCH my thighs!" issue), Dove sensitive skin soap, which I use on my face and body, My red nail care kit (any idea if they'll let me fly with little tiny scissors?), and the scraper thing for when I get calluses on my feet (Gross to share, but important to have). And floss.
The liquid bag is still a little uncertain. Packing contact solution is the biggest pain in the ass thing; I wish I'd been able to have laser eye surgery last winter! Also: hand sanitizer, various types of sunscreen (won't be enough for the whole trip, but will at least get us started), moisturizers, Tide packets for washing clothes, 2-in-1 shampoo/ conditioner (takes less space!), eye makeup remover and toothpaste.
Obviously I'm not showing you my toothbrush, my daily multivitamin, my makeup and all of the regular stuff I use which will go along. I've found that packing the daily stuff is usually pretty simple, since I really don't wear much makeup!