What to do with all of the accessories? (DVD player, xbox etc.) Im having my tv wall mounted?

I just got a house and its a smaller one so i am trying to conserve space buy wall mounting the tv. ( it looks much cooler too). I don't know what to do with all of the accessories. I was think about a having a void built into the wall under where it would be mounted so it would let me run the wiring easier also. or running the accessories into a totally different room ( hallway closet ).