I remember many years ago reading an article in a magazine about packing to go on holiday. It said this:
Put EVERY thing you think you need on the bed
[clothes, toiletries, personal stuff etc]
Now put HALF of it away again.
You only need 50% of what you first thought.
I think I must have taken this to heart down the years, because when I begin my packing these days, I am thinking minimally from the get-go. I try to pack as little as possible.Another 'tip' I came across was this :
If you are holidaying in the UK, wear trousers for travel, pack underwear for the remaining days and use a small case. Then pop into a charity shop and buy a dress and a couple of tops. Swap these around through your stay. On the last day, put all but your underwear and travel outfit into a bag, and give it back to the CS
That tip may make for very minimal luggage - but raises too many questions - do you give back the stuff unwashed? What if the top is now damaged? If you fall in love with the dress, how do you fit it into your small bag?
In the past few years, we've rarely had holidays 'away' - we just came to Cornerstones. Since retirement, our trips have been in the UK by car [plenty of luggage room] and our one Paris trip [by train] was brief and we had minimal packing [as we did in the days of motorbike holidays - three pairs of knickers and a tin of soap, and not much more] But this year, now Bob's back has been treated, and we are flying abroad. So what's essential in my luggage?
Passport and tickets [keep copies of all important info on my phone as well]
Prescription medications [so many pills...] which should be kept in the original boxes. Customs may refuse plastic bags with strips of meds which have been trimmed to just the 7 days worth, as they cannot be identified.
Technology - phones, tablets, headphones, charging leads, travel plugs.
Toiletries -toothbrush, hairbrush, suncream etc [I have treated myself to some little bottles for decanting shampoo etc]
Random useful bits pen, bite-zapper, tweezers, mini-sewing kit, lightweight fold-up tote
Clothes and shoes - a hat, underwear, swimwear, and a 'capsule' wardrobe
And not much else!

Bob has never quite got over the shock of seeing me unpack teabags, mugs
and a flask on our honeymoon in Yorkshire [I was so thrifty, I wasn't paying for cups of tea in
Betty's!] These days when I pack, he will watch me and say something like "They
do sell tea in Kent, you know..."
My Son In Law Gaz gave me a very useful tip - if you are staying in a hotel, [especially abroad, or in an unfamiliar city] grab one of the cards from the reception desk and tuck it in your bag or pocket. That way if you go out for the evening and want to get a cab back, you can easily show the driver the correct details.
What are the essentials in your suitcase?
What have I forgotten in my list?