Here it is for 10 days of travel in a nut shell! Last time was September so it can get a bit tricky because of the weather.
First and foremost make sure your suitcase has the correct dimensions for European travel, plus only 22lbs allowed. I know, that sounds crazy, but it will work! Plus I love carryon, just grab and go!
In my tote (which hooks onto my suitcase handle) I always have my small purse, passport, ID, some cash, debit and credit card, phone, earphones, small charger, 2 books, notepad, pens, supplements, water, Dr. Lucy skincare (I brought 2 kits for 10 days last time),makeup, mini blow dryer, mini cosmetic mirror, hair brush and clips, toothbrush, mini toothpaste, large scarf/wrap, lightweight sweater(planes are cold!) dried fruit and nuts.
In my suitcase (hard shell, carry-on), I swear by packing cubes. I promise they really work for condensing your clothes. Tops, shirts, pants, dresses, under garments, etc, each have their own cube!
I packed 2 summer shoes and a pair of ankle boots. 4 t-shirts, 2 shirts, jeans, black and white pants, 2 t-shirt dresses and one nice summer dress, a skirt, light weight blazer, bathing suit(for my stop over in Marina di Pisa to see friends), underclothes for everyday, a silk, short, lightweight robe. That’s about it!