Hey, I've been playing for just over a year now, I'm trying to learn how to tune a guitar by ear, I've just done it for the first time but it's taken me about 20 minutes to do so, how long does it take before it becomes second nature?
All you really need to do is play a 5th chord and then tune up/down till it sounds right. So it doesn't take that long.
Takes me about a minute.
Some research by a user named airship should be of use.