2. Bring an umbrella buggy. Preferably a Macleran. If you bring a big buggy and try to ride the tube or bus, you will be very frustrated.
3. Try to avoid tube/bus between 8-9a and 5-6pm. (the am rush hour is a bit later here than in US). Oh, and go to the end of the platform when you have kids. There is usually more space there.
4. Pack snacks.
5. Half term: the week that English and French school kids have off in the middle of the term. This means EVERYTHING is busier. If you have to travel during this time (refer to internet for dates), get to the museums before they open and stay for only a few hours. Or, go for the last few hours of the day. The middle of the day is worse than a mall at Christmas.
6. At about 3pm, head back to the hotel for tea, snacks, a little downtime. If you have a child that naps--DO NOT SKIP NAPS.
7. Bring an umbrella and rain cover for buggy...no matter what the weather looks like when you leave the hotel.
8. If you go during half term and want to see a childrens' show, book tickets ahead of time. THEY WILL BE SOLD OUT.
9. Do not, I repeat, do not wear sweats, white tennis shoes, or wet hair to breakfast. All other cultures attend breakfast in the hotel fully dressed and you will look like a sloppy American if you do otherwise.
10. Carry the ugly backpack, instead of the cute handbag. You will be happy when you are able to carry snacks, a few small toys, babywipes, etc AND have your hands free to hold on to your little one on the busy, busy streets.