I volunteer on Wed and Fri in "town", and I try to do all my errands while in town, post office, grocery store, tax office, bank, pay electric bill (save those stamps), and Wal Mart (saving gas).
Cut off lights when not in use, keep temp on 68, drink water in restaurants.
In quilting, I do not waste anything. I cut all scraps into some size blocks (1.5, 2, 2.5, 3, 4 in.) to use later in scrap quilt.