Using these D'Addario EZ910 acoustic guitar strings is easy. First, loosen the old strings and remove them from your guitar. Then, thread the new strings through the bridge and the tuning pegs. Tune each string to the right pitch. When you're playing, be gentle with the strings to avoid breaking them. To keep them in good condition, wipe the strings with a clean cloth after each use to remove sweat and dirt. Store your guitar in a dry place to prevent the strings from rusting. With proper use and care, these strings will keep giving you a great sound for a long time.