1. Enough space. If you want your entertaining island to be the center of your party, plan it wisely*. Be sure you have enough space (36" to 60") behind it for guests to pull out stools without hitting a wall. Give yourself wide enough work aisles (42" to 48"), to not bump into your guests on either end. Put appliances guests are likely to use, such as icemakers, near the end so they're easier to reach without interrupting your work flow. Plan a comfortable overhang (15" for counter height, 12" for bar height), for seating, as well. Too short and guests will bump their knees.* The dimensions from the National Kitchen & Bath Association's Kitchen Planning Guidelines.