Tuning!

Wow, she's a beauty. 

There's a lot of tuning guides on Youtube, you just need to pick one.  Here's one but he takes about 2 minutes to play the Open E (6th) string.  Once you get that one this lesson will keep you in tune at least close for the time being.

http://www.youtube.com/watch?v=Vkrpbng5hFg
And welcome to Chordie.
Steve

Great picture, lovely guitar, beautiful young lady.

To the question--how do people tune it by ear?--
  With every ones ears being different . For me, if I gently thumb pick an in tune open A,then while it's still a firm sound. Gently thumb the D string. When you can hear the oscillating tone from the D, adjust the tuner -up or down in tone- till the D is a straight sound wave in your ear with the A string. Then the G string to the D. and so on an on. To get the A string in tune. Use a 'A' tuning fork and tune the A string to it with the same method of listening to the oscillating tone waves and trying to make them parallel . I think every one can hear this , if they pay attention and know what to listen for. It usually "not always" works for me.  Hope this helps, never tried to explain this before.

  P.S. when tuned this way, any open string's wave will be parallel with any other open string and to any fretted note, if fretted just right, and if the intonation is superb. And judging only by the appearance  of your beautiful guitar, this should work.

Aabb, first off if you hid my tuner and loosened off all my tuning pegs I wouldn't use my ear to start with, I'd adjust the strings until the tension felt right under my fingers, obviously this is an experience thing and I don't mess with different gauge strings. Second I'd pay attention to the bass E. E tends to be the note/string your ear gets most atuned to. Then I work down fretting at 5th and tuning the string below to that. The Exception is the G string which you fret at 4th. Once you get to the treble E you can compare it to the bass E. Keep repeating till things sound right. The guitar is then in tune with itself, maybe not perfect 440hz but since I don't use it in a band good enough. People will not run screaming from a guitar tuned this way or indeed vocals sung to it. Perfect-pitch freaks will object though. If you find it odd, well that's your ear developing ;-)

That is a beautiful photo the guitar is unusual especially the sound hole Ive never seen one like that and you are a very attractive lady good combination

Now now cytania , I wasn't  advising Seersha to tune by hear, only trying "poorly I guess" to explain what to listen to when tuning by ear,   
But if your tuner was ever misplaced and your pegs were loose and I was nearby. You could use my tuner, I'm never without one. In standard pitch is the only place to be, just ask the piano player!