Here at Apartment Therapy we're big fans of the gallery wall, and have sung its praises at length over the years. But for renters, all that measuring, arranging and hammering might not be the most practical solution.
A better one could be the impact of a single, oversized piece of artwork — nothing brings a white wall to life faster or more completely. Take inspiration from these rooms, all of which use the "white walls + big art" formula with aplomb.
(Images: as linked above)