~DO make use of the classic work triangle. Arrange the sink, refrigerator, and stove (the three features used the most) in a triangular pattern. It's generally agreed upon to be the most convenient setup because it saves unnecessary steps.
~DO consider how many people work in the kitchen at once. If it's more than one you might want to incorporate more than one workstation. If there's enough room consider adding an island or purchase a wheeled cart that can be moved around the room and put away when not in use.
~DO plan to have at least 36" of counter space for food preparation, with 24" on one side of the sink and 18" on the other. If you can fit more, do so.
~DO leave adequate floor space in front of appliances so the doors can be opened and you can still walk in front of them. 30" to 48" should be sufficient.
~DO leave enough room for traffic flow. There should be 42" between the counters and the island (if there is one) so that people can easily walk through.