Lay under the middle of the car and look to the passenger axle. You can see the back of the metal CV cup where it enters the transmission.

Take any piece of wood or thing..I often use a long handled hammer and put the handle end against the back of the cv cup..then hit it with another hammer. One or two quick smacks is all it usually takes. Basically just get something against the back of that cup when you are laying under the car and you'll have no trouble. The driverside is the pain in the neck. My best tool for that is the Gearwrench 82248 indexing prybar. Ask Scottydoggs, Intrigue98 or Drunkie.... it makes that axle a piece of cake. Downside is most people won't use a prybar that size enough to warrant spending the coin on it.