My favorite thing this week is rolling furniture! It really does make life a little easier and adds a level of versatility that you don't get with regular stationary furniture. These rolling cube storage bookcases from West Elm http://www.westelm.com/products/rolling-storage-p008/?pkey=call-office-furniture are a great find starting at just $299. These are perfect because they can be moved for cleaning, or the tall one can be used as a room divider.
This leather ottoman from Crate & Barrel is extremely versatile when entertaining http://www.crateandbarrel.com/furniture/ottomans-cubes/townsend-leather-ottoman/s173897. Normally it could be used as an accent piece, pushed against an empty wall with some artwork above. When your guests arrive, pull it out and place it near the seating areas. Guests will not hesitate to roll the ottoman over if they want to- which they wouldn't dare to do with a stationary piece.
The power of mobility ;)