Choose a good location for the hub. Whether this is in an office or in your garage or a closet, it should be secured yet easily accessible. Putting it near (but not right next to) your circuit breakers may make sense, but make sure to keep the wiring separate as power and ethernet are not buddies.
Run, as pauska said, at least two wires of Cat6 to each jack. Sure wireless is convenient, but for those machines that are stationary, having a hardwired connection results in a more secure network as well as a significantly faster network. Personally, I'd make sure each bedroom had at least two lines, the living room has at least 4, the office has 6 or 8, and the LAN party room as at least 48, but that's just me, and not everybody can have a LAN party room.
Just like you'll never place the switches right next to the circuit breakers, you will not put the network jacks right next to the power outlets. Make sure they are separated by at least a full stud section (16 inches). Do not run the power and ethernet on two sides of the same stud. You can run the ethernet near any coax (cable) as the current should not be enough to cause problems there. Telephone wiring is also OK to run near. However, as telephones can be plugged into ethernet jacks, I'd replace all the telephone wiring with network as well. Just because you can.