shaglio
The Prince of Dorkness
That i could click a tech that's still far away and the game would beeline to it. Instead of trying to do it manually.
And that was after approximately 1400 hours of civ 5. I'm serious.
What's even better than that, is you can then shift-click on another far away tech and it'll beeline to that one after the first one is finished. That helps a lot with RA overflow so it doesn't get wasted on a tech you don't really want as much.