Don’t leave it to the last minute. Let the post office know when you are leaving and when you plan to return. They’ll hold your mail so that your mailbox doesn’t fill up and make it obvious that no one is around to empty it.
When you return, you can pick up your mail at the post office, or just have them make one big delivery. Don’t forget about the newspaper. Pause delivery for the time that you’re away. There’s no better indication to a burglar that no one is home than a week’s worth of newspapers piled up on the front porch. Your home doesn’t have to look empty just because no one is home. It is pretty easy to make it look like someone is around.
Put one or two lights on timers so that they come on at dusk and turn off at some point during the night. You can even set timers so that your lights aren’t coming on in the same order, or at the same time every night. If you’ve got a smart TV, you can even set it to turn on and off with a timer. You can probably even control your TV remotely with an app on your smartphone from wherever you are.
That’ll really make it look like someone is home. If you want to be really sneaky, you can use a light that mimics the patterns of a TV. Set that on a timer, and you’re all set.