Using these D'Addario Nickel Bronze acoustic guitar strings is simple. First, remove the old strings from your guitar. Loosen the tuning pegs and take out each string one by one. Then, start installing the new strings. Thread the end of the string through the bridge and then up to the tuning peg. Wind the string around the peg and tune it to the right pitch. When you're playing, be gentle with the high strings as they have less tension. For maintenance, after each play session, use a clean cloth to wipe the strings to remove dirt and sweat. This will help keep the strings sounding great and also extend their lifespan. Store the extra strings in a dry place to prevent rusting.