Last Law of Travel (Big Joe Rule):As has been described, you must endure great trials just to get from town to town: locating different vehicles, operating ancient transport mechanisms, evading military blockades, the list goes on. But that's just you. Every other character in the game seems to have no trouble getting to any place in the world on a moment's notice.
Law of Numbers:There will be several items or effects which depend on the numerical value of your hit points, level, etc., which makes no sense unless the characters can see all the numbers in their world and find it perfectly normal that a spell only works on a monster whose level is a multiple of 5. (related, in a way, to Statistically Speaking)
Magical Inequality Corollary:When the enemy uses Petrify, Silence, Instant Death, et cetera spells on you, they will be effective 100% of the time.
Pretty Line Syndrome (or, Crash Bandicoot: The RPG):Seen in most modern RPGs. The key to completing your quest is to walk forward in a straight line for fifty hours, stopping along the way to look at, kill, and/or have meaningful conversations with various pretty things.
Guy in the Street Rule:No matter how fast you travel, rumors of world events always travel faster. When you get to anywhere, the people on the street are already talking about where you've been. The stories of your past experiences will spread even if no witnesses were around to see them.
Franklin Covey Was Wrong, Wrong, Wrong:Sticking to the task at hand and going directly from place to place and goal to goal is always a bad idea, and may even prevent you from being able to finish the game. It's by dawdling around, completing side quests and giving money to derelicts that you come into your real power.