Have a dopp bag all set to go and prepacked - travel size bathroom stuff, extra contacts, a $20 bill (just in case you don't have cash on you or lose a card), travel size medicine (pepto, etc) and a mini sewing kit (in case a button falls off etc).

Each trip back home just make sure you have enough lotion, deodorant and toothpaste for the next trip.

A travel sized steamer if you can fit it in the luggage - like the others have said Hotel irons SUCK

I tend to pack at least one extra pair of pants and underwear just in case