I rarely use a chain stitch selvage.
1--learn how to snug up first stitch to have even neat stitches on every edge (use chain because you want too, not need to)
3--simple double knit edging ( see Anne Modesitts Leaf scarf in Scarf Style... Excellent use of simple double knitting as edge/selvage!)
4--Cables (cable make great edge stitches)
5-- other selvage stitches (YO/K2tog ) is an interesting selvage, a bit like a picot, and very nice on a scarf or other garment that is not seamed
6-Hems (or for side edges, facings). Knit separately and sewn on, or knit in place
7--See Nicky Epstein's books:
Knitting On the Edge
[U][B]Knitting Over the Edge
Knitting Beyond the Edge
[/B][/U]Over 1000 ideas(over 350 ideas per book) --and when bought at full price (WHY?) still under $100--(or less than 10 cents per idea)
These books are easy to find discounted (or at chain stores like Michaels/ACMoore/Etc that offer 25 to 40 (sometimes 50!) percent off coupons. Meaning 1000 ideas/patterns for way less than 10 cents per pattern! What a bargain--they would be cheap at twice the price.
(note: i just this week made some face/wash cloths --1 each with an i-cord edging (all 4 sides--i cord cast on, i cord edge, i cord bind off) and one with a simple double knit edge (k1, sl1, (repeat))
you can see them on my blog.)