Tonight is Game Night and we have a long journey ahead of us. Our 4E D&D campaign is set in our GM's own campaign world, The Sunless Citadels. Our PC's have just completed their mission to recover a powerful artifact and symbol of power for the last remaining Human King. But the mission isn't complete until we get home and we know our GM is sneakier than a sneaky person wearing sneakers and called Gollum.
GM's are often faced with 'The Journey' as a significant plot element in any story. Just look at Tolkien. Practically all of The Lord of the Rings is a journey. I have played games where the journey is little more than a series of randomly generated encounters. In other games the journey has been glossed over completely and we start the game at the Dungeon entrance. In my own D&D campaign over two thirds of the last adventure I ran took place 'on the road'.
It could be argued that 'The Journey' as a plot device is overused but I would argue that it is central to every story ever written. The main character or characters either go on a physical journey in the story or a mental or emotional journey as a result of some event. Even the reader is taken on a journey as the story is told. Without a destination there is no point starting out, and therefore no story to tell.
Which leads to the true point of this post. What drives the journey? In the current campaign , indeed in most fantasy campaigns, its a MacGuffin. This is an object (an artifact, location or NPC) which drives the actions of the characters. It's actual nature is not necessarily important to the story so long as the characters treat it the same way. In the current campaign the MacGuffin is a "Sceptre of Power" but it could just as easily be the "Chamber Pot of Authority". Ultimately the artifact is unimportant, it's the journey that counts.