I've always found that the easiest way for me to teleport (passively) is to just walk through a wall.

Just walk up to a wall and realize that wherever you want to be is on the other side. Then walk through.


Alternatively you could use a mirror, it seems that their more liquid-like appearance helps most people out. (or a TV, the possibilities are limitless)
Another fun way: jump into a pool of water and then resurface somewhere new.