A simple sigil has to be drawn and then one has to, ah, use their blood for the final symbol. It's that symbol that helps grant the person full use of it. B-Blood is, very powerful when you need to make something connect to the person using the sigil in question. Blood is a bridge of sorts it makes the spell more powerful than if you drew the central symbol with chalk or something else.

After that, well, you simply need to picture the place you want to go to in your mind and that's it!