After changing guitar strings, you will find that your strings get out of tune very easily for about 1-2 weeks, depending on how much you play and how often you retune. This is due to the fact that new strings stretch, causing them to go out of tune very easily. I want to share a little secret on how to overcome this problem, to save you the constant hassle of having to retune often.
When you put on new strings, you need to stretch them manually, otherwise they will keep going out of tune until they stretch by themselves. There is a very simple and straight forward method of stretching your strings after changing them, which most beginners don't know about, and therefore have to retune almost each time they pick up the guitar.