An island is an obvious solution and for good reason. They can add surface/work space and storage underneath. And these days, you have your pick when it comes to island style, size, etc.
via Houzz
I don't think the island has to match your cabinetry, but I do like them to be tied into at least one other element in the space, like this island does the hood.
via Apartment Therapy
via houseoffifty
Keep it clean and sleek looking and it will help keep the small space from looking cluttered. Dress it up with a vase and flowers when you have company over.
via pinterest
Buy one with wheels so it can roll away if you need it to! Some kitchen's need that extra work space but it's not convenient to have around all the time. We actually have this exact same island from Ikea and it's going strong 4 years later.