Two of my current WIPs had me thinking about garter stitch edges lately. If you just knit row after row, that first stitch often gets loose and floppy unless you do something to tighten it up. These two designs tackle the problem in clever ways. No simple slipped stitch here!
First up, Martina Behm's Hitchhiker - that addictive little scarf pattern - grows into a toothy swirl of garter stitch. The teeth have a stockinette edge and the curve is formed by a k1f&b on every row (beginning the RS rows and ending the WS ones). The result is a tidy, yet extremely elastic, edge. No need to pick up and knit a border to hide imperfections on the edge.
(This is my new midnight knitting project, now that I've finished the girls' latest knits. The decadence of the cashmere silk blend I'm using more than makes up for any boredom my fingers might feel with the garter stitch.)
If you're working a sweater or similar garment with a garter stitch edge, I'm a big fan of slipping the first stitch of the row knitwise, with the yarn in back. It makes for a neat and tidy edge without disrupting the garter ridges. That's what I used on Sprout's latest sweater and it worked like a charm.