If you've experienced the heartbreak of wearing out a beloved t-shirt, despair no longer. Here is a recipe for turning an old t-shirt into a pair of knickers.
Find a clean (if you care) shirt that strikes your fancy. I have used shirts with printed pictures or words, anything I thought would look good on my butt. You might not want to use your prized material possession if it's your first time. Figure out if you have enough material for underwear (see item 1 above), and cut out the two main pattern pieces. You can cut the crotch piece out of the same material, or you can use a new fresh T-shirt or whatever. (I keep a few Hanes white undershirts on hand.)
(via Preshrunk)