I just got back a few days ago and I had done exhaustive research on these boards, with Rick's books and with other sources. I thought I had all the info I could possibly gather to make my trip successful. It turned out travel days were more difficult that I expected because I didn't have enough detailed information about how to do it or where to go.
It sounded so easy when I read, for instance, to get off the train, take the metro at such and such station and walk to hotel. The problem is when you get off the train or plane, you have no idea which way to go. Airport, bus and train stations don't have enough signs pointing you in the right direction. When you need to find them, metro stations, bus stops, TI's, etc are not that easy to find.
Next time, If I can't find detailed instructions I will post the question so I won't spend so much precious time and energy on travel days.