For additional storage area and to keep carefully the clutter at bay look for clear plastic storage bins you can use under the bed, or purchase a coffee desk for the living room that contains drawers underneath. In this manner you will keep all those items you don't use often stored away and out of look until you need them.
Apartment kitchens can be so little that only 1 person can be in the room at a time. Keep counters cleaned off by putting small appliances, breads, chips, food and other items away in cupboards or the pantry if an example may be available.
The bedroom may be small as well; furnish it with a twin or full size bed, a nightstand and dresser. Keep muddle in this room to the very least as well, and add color with large wall hangings.