Fill out a mail forwarding request with the TV post office to have all your mail sent to your permanent address. We also left a note in our TV mailbox informing the postal worker of the same thing. They'll throw all your junk mail away. I peered into our TV mailbox after a few weeks - the postal worker had taped across the end of the box so no mail would get put in there.
The forwarding request is good for a year - should be more than adequate to get any 'real' mail squared away.
Bill