Hang pots and pans in the open rather than hiding them away in cabinets. This serves the dual purpose of being functional and decorative. Hanging pots and pans in the open allows you to access them easily and places an important element of the kitchen in a decorative role.
Install dimmer switches on the lighting. This, again, will give you a dual purpose of functionality and aesthetics. You can have bright light for prep and cooking, and a warmer, softer lighting for gathering in the kitchen with friends and family.
Decorate the walls with various sizes of paintings or photographs with food-related themes. The images don't need to specifically be food. Choose a theme that fits your personality. Some themes might include Americana, Italian countryside --- or wine theme --- or bakery decor.
Arrange canisters, spices, themed salt and pepper shakers and knickknacks to fit your theme on counters or on shelves. Place fabric on counter spaces wherever possible to help reduce the reflective surfaces and hard edges found in many kitchens. You'll be surprised by the difference place mats and patterned towels and tablecloths can make.