I'm not sure this is posted in the right place but I trust it will be moved if needed

I realized today that we will be moving to London in 11 weeks. There's so much to do and it's coming very fast. I'm supposed to be there the week of 10/19 to start work 11/2.
How did you manage the stress with this move? Suggestions regarding what to ship by boat/ air/ or take with you on the plane would be great. Three of us are going (myself, hubby and son who will be 2 yrs old).