TV, Computer, lamp, etc etc, it really depends on what level your at, I think iif it was me and I had just finished the free tutorials, I would go for something thats very much based on a promitive object (hence the TV or computer as its really a modified cube, a Lamp as its a cylinder etc etc)
Also if its something that your using every day then its a bit easier to visulise as its there.
Just remember to get the basic shape and then go form there adding as much detial as you can as its the details that will make you learn more about modeling
"No pressure, no diamonds" Thomas Carlyle