I have a list I update/save on the computer each year that helps me remember everything we need. I add names against the side of the main luggage items and then tick off when that item is fully packed. If you have a washing machine just take less of each item.
For hand luggage we have:
Tickets, passports, money
Insurance stuff
Nintendo?s, kindle, books, tablets, headphones, chargers, toys
Sweets, chewing gum
Mini deodorant
Baby wipes
Sunglasses/glasses
Camera
For main luggage we have:
Underwear (pants, bras, boxers, etc)
Swimwear (trunks, bikinis)
Goggles
Shorts
Trousers
T-shirts/vests
Shirts
Skirts
Dresses
Dressy Tops
Leggings
Sandals
Make up, face wipes, moisturiser
Sun cream, aftersun
Insect repellent, plug in insect killer, Adaptor plugs, Hairdryer, hairspray, brush, bobbles
Shower gel, puff, shampoo and conditioner, razor, shaving gel, toothbrushes, toothpaste
Anti-diarrhoea tablets, dioralyte, calpol, nurofen, piriton, bite and sting cream, paracetamol, ibuprofen, anti-histamines, nasal spray, indigestion tablets, plasters, hand foam, baby wipes, towels, travel wash, tissues, tweezers, nail clippers, moist wipes, floss