Karl Voit shares a nice trick with us. Suppose you want to SSH into your home server. You may be loath to open a port in your firewall and your ISP may assign you a temporary IP address that can change at any time. These problems can make accessing your server difficult.
Voit has just the solution: access your server through TOR. The trick is to run a TOR hidden service. Sure, that’s what all sorts of shady enterprises do but so do Facebook and other legitimate enterprises. It turns out that it’s really easy to do this; see Voit’s post for the details. Once you’ve got it set up you can securely access your server even if you have a dynamic IP address.