How to change a guitar string correctly

It's really important to string your guitar the right way in order to obtain the best performance from your instrument. If you string it the wrong way, you will have difficulties to find the right tuning

Bridge

Strings are attached to the bridge. Stringing a guitar depends on the type of bridge and strings. We always start to string a guitar on the bridge end before the headstock.

Neck

To attach a string on a tuner post, pass the string through the hole.

...then around the lower side of the tuner post, 

...under the string,

...and then, around the tuner post.

The string will lock against the tuner post as you tighten the string and prevent it from slipping.