Here's the packing list:
3 pairs of pants
2 pairs of shorts
2 pairs of sandals
2 pairs of loafers
1 pair of heels (necessary for one 2-hour business meeting-ouch)
2 long-sleeve tops
1 leather jacket
1 silk robe (not worn during trip--robes supplied on train and at hotels)
1 bathing suit (not worn)
2 pairs of comfy yoga pants
I also brought a shoebox full of hotel-sized amenities like shampoo, body wash and conditioner, most of which I didn't need to use.
I had 5 books with me--a Russian language book, which I studied diligently for an hour a day; Lonely Planet Moscow (albeit circa 1993); Lonely Planet Trans-Siberian (a new edition--not LP's greatest work); Bel Canto by Ann Patchett (my plane read on the way to Beijing); and Travels to Siberia by Ian Frazier. The latter was my train read and I thoroughly enjoyed it.
Other than that, I had an umbrella, sunglasses, glasses, drugs and potions, a neck pillow, a butt supporter, mini-headphones, and a few notebooks....plus iPad,cameras, batteries, chargers, adaptors, credit cards, an ATM card, and my passport.
All were packed in a 26" Biaggi foldable suitcase, a small rucksack, and a purse.
Yes, I did break my three-pairs-of-shoes rule, largely due to my two-hour need for heels (I actually could have done without one pair of sandals--but they don't take much room, anyway). But other than that, I have to pat myself on the back for another packing job well-done.