carry-on bags that fit just right (had to research that first),
warm clothes,
getting all my electronics, cables, power converters (us, moscow, london) together for:
phone, camera, laptop.
then packing all breakables into small carry-on all klotski-style,
including laptop bag inside carry-on bag, per (maybe?) UK restrictions.
new gadgets for trip:
-- laptop bag/glove w/ shoulder strap.
-- new Canon Elph? haven't got it yet. can't carry around massive SLR the whole time and my old Elph is .... very old.
--
etc, etc.
so much for stress-free hacking this weekend.