when i was in my office (i work from home now) i had a bed, travel bag/crate thingy, a basket with some toys, a food and water bowl and a little supply of food in a zip lock baggie that i kept at work. I trained maggie to go potty by putting bells on the door that she can ring when she needs to go out, so i got some bells for my office door. I also kept a brush and some baby wipes, and a few extra hair bands. I also took a set of pj's in case the office a/c was down low and it was cold in there
good luck!!! it's awesome to be able to bring your baby to work! I consider it a huge blessing.