Get a good cottontail and jackrabbit call. I personally use the Circe cottontail and the Pure DC-1 jackrabbit. Both have excellent sounds. Start with the cottontail at a low volume and work louder as time progresses. If nothing happens, switch to the jackrabbit and, again, go from a low volume to a high volume over ten minutes or so. If you move on to an e-call, Foxpro is probably the best. You should always have the mouth calls with you though. If your e-call goes south for some reason, you always have a backup.