I am taking the Best of Scandinavia RS tour next summer and have started making my free time plans. I will have 3 1/2 days in Stockholm.
Day 1: Arrive Arlanda at 7:15 am. Take Flygbussarna bus coach to Stockholm central terminal and then short subway ride to my hotel neighborhood. Drop my bag at hotel, check in if room available.
Walk or take bus to Djurgarden. Visit Nordiska Museet. Visit Skansen. Have lunch here.
Take a Stromma dinner cruise on a Cinderella boat to Sandhamn and back.
(I had very little jet lag issues last year when flying into Dublin. Based on my experience doing one indoor activity, lots of outdoor activity and a dinner activity)
Day 2: Hotel Breakfast. Visit Nobel Museum, Visit Medieval Museum. Visit Millesgarden.
Meet tour group at 4 pm for neighborhood walk and dinner.
Day 3: Hotel Breakfast. With tour: Gamla Stan walk and visit Royal Palace including Armory. Lunch in Gamla Stan.
With Tour visit Vasa Museet.
On my own: RS Modern City Walk. Free dinner at Hotel.
Day 3: Hotel Breakfast. With Tour see City Hall
BACK -UP: Other activities to add in or replace some of the above on the fly.
Hop on Hop off Bus/Boat
Royal Canal Tour
Royal Stables
Historiska Museet
Sky view
Fjarilshuset -Butterfly House