I can't believe how long I went without properly restringing my guitar. My strings broke all the time, the guitar never stayed in tune, and taking the strings off was a chore. These tutorials are a fantastic way to care for your guitar. The first one guides you through cleaning and maintaining the body while the second focuses on the actual restringing and action adjustment.
Cleaning your acoustic guitar
Turtle Wax: Express Shine (or guitar polish)
Lint-free cloth (or polishing cloth)
Steel Wool #0000
Boiled Linseed Oil (or fretboard cleaner)
Wrench for headstock tuner nuts
Restringing your acoustic guitar