I had been doing it BACKWARDS! ("Slip the first stitch" will not get you this, sadly.) "How To Knit a Neat Selvage." Knit to the *LAST" stitch of each row and bring the yarn FORWARD BEFORE slipping it. The result resembles a line of knit stitches running up the side of the piece, not unlike a bound-off edge. Perfect for the top of a rotated slipper, or for stitches to be picked up later.
How to Make a Crocheted Dishcloth (picture tutorial). Fun gift idea and make some for yourself too!