You should enable the management plugin.
rabbitmq-plugins enable rabbitmq_management
And here for the specifics of management.
Finally once set up you will need to follow the instructions below to install and use the rabbitmqadmin tool. Which can be used to fully interact with the system. http://www.rabbitmq.com/management-cli.html
rabbitmqadmin get queue=<QueueName> requeue=false
will give you the first message off the queue.