I discovered this the other day and thought I would share. If it has been posted or if you already knew I apologise. I didn't know till I discovered it and thought others might find it valuable.
Let's say you are out in the middle of nowhere, your pack is full, and you just want to go home. Well you could try going to WvW but the servers are full. You don't want to pay the travel fee do you? Well there is another option.
1. Click "H"
2. Click the PVP Cross sword icon on the left at the bottom
3. Click "Go to the Heart of the Mists"
4. Once there go through the Asura Gate to Lion's Arch and you can get free travel to any starter city you want.
Safe Travels.