How to pack for a three week holiday in all weathers

Packing to go on holiday can be a fraught experience where sometimes you just throw everything into the suitcases and hope for the best, and you wear half of what you have taken and spend the whole time lugging a heavy bag around feeling frustrated with yourself for not taking more time. This time we are travelling to: Turkey- hot temps between 28 - 35oC so VERY hot by NZ standards Sweden - temps between 10 - 18oC - cold compared to Turkey London - temps between 12 - 22oC - coolish but not as cold as Sweden New York - temps between 18 - 30oC - so hot again!! This has meant that I will need to take more warm clothing than I usually would on a hot holiday. I am also running a half marathon, so I need sports clothing that performs well. I have limited the packing to three pairs of shoes; 1 pair of trainers that also double as casual shoes - after much searching, I have opted for Skechers, which I haven't run in before so a risk but these are designed for running, and I'm finding them great! 1 pair of Ecco sandals that I can walk in - super comfortable and a great option 1 pair of Birkenstocks - I could have left them at home and managed with one pair.... https://nz.ecco.com/product/ecco-gruuv-sol/213103/02710 https://www.skechers.co.nz/shop/women/footwear/athletic-sneakers https://www.birkenstock.co.nz/collections/womens-sandals Clothing is as follows: 1 pair of jeans 2 pairs of lightweight trousers 2 long sleeved shirts (one light weight and one medium weight) 2 short sleeved shirts 2 singlets 2 tops 2 very fine long sleeved thermals 2 pairs of shorts 3 sets of sports / workout gear: 3x shorts, 3x sports bras, 3x sports tops - running visor and sunglasses 3 dresses 1 puffer jacket 1 rain jacket 2 cardigans 1 jersey This feels like a great amount of clothing for the travels I am doing. I may have been able to trim, but I suffer in the cold! Luggage I prefer is: https://www.lojel.com/category/travel/ https://www.cotopaxi.co.nz/?gad_source=1&gad_campaignid=21369784761&gbraid=0AAAAAoaFc6ATnwzGc-X3zrK4hzZLlIIT8&gclid=EAIaIQobChMIiNH7tNrZlgMVuKhoCR3Hki91EAAYASAAEgKkevD_BwE If you want some help with packing please feel free to reach out and I can help!