If you have been playing guitar for about three to four years and you still only use the open postion this article is for you: Why not try playing your open chords in a higher postion to get some variety in your playing? Single string melodies in open position? Move them all the way up to the twelfth position and start playing them there.
Once you start to play in higher positions you will notice that the position of your wrist will be different, you will need to adjust how you hold the guitar. Using a strap is a good habit, it will help you to adjust your wrist position even without too much thinking. Keep your strap low enough so you can still move the guitar around, having the strap too low will cause some difficulty getting up to those higher positions. Yes I know, Slash places his foot on his monitor speaker to bring the guitar up when he reaches out for those higher notes, you could also have your strap a bit higher so you can actually reach those notes without too much bother.
It is possible to play your open chords in higher positions as well. The CAGED system, using barrechords of well-known open chordshapes, works wonders for doing so.
If you have never played your guitar in higher positions it may feel a little strange, but it is only natural since you are not used to playing up there. Try to get used to using the whole fretboard instead on just a few positions, it will help your music, musicianship and your guitar playing in general.
Have Fun and hope to see you soon again,
Eddie