The Guitar Habits site has a post on adding some Zen meditation principles to your guitar practice routine.
“Guitar practice is in itself a form of meditation. You need to stay focused on what you practice and not let your mind wander. It is about concentrating on your fingers, your technique, letting go off tension, recapturing yourself, letting it happen, continually shaping and getting back to the essence of your practice.”
If you live with family or have roommates then you have also been interrupted during the middle of a practice session. Here is some advice:
The best way to practice is in solitude. Tell your family when and for how long you are going to practice. Ask them to give you some privacy for the time being. Find yourself a room in the house where you can have some peace and quiet. Create your own sacred hide out where you can play your instrument, where you can practice without distractions (turn off all electronic devices) and work on becoming a better guitar player or songwriter.
Check out the post for some more tips.