Remember, you’re only allowed 20kg, depending on the number of days you’re going, it isn’t much.  Pack a few items that coordinate well, colors such as black, blue, beige.  Don’t bring your favorite or most expensive clothes, it could get damaged in the public washers, get permantly stained or lost in the wash services. Stick to stuff that does not need to be ironed, bleed or shrink. Solid colors is good and one nice top for the group pictures and dinners. You will not have time in the morning and will be too busy at night to prep your clothes before they are worn (ie iron). but for special occasions some places do have irons avaliable.

Shoes:
Bring one good broken in walking shoes.
Bring a pair of casual/dress shoes.
Bring a pair of sandal/slipper/thongs to wear in the showers.