I will mostly do a simple single crochet border, sometimes that ... cookie border? NO idea what it is called, but it's a row of single crochet, then working on sets of 5 sc, sc, hdc, tc twice, hdc, repeat, something like that. gives a nice border,but only from the right side.
On a side note, I only learned crochet because I used a crochet hook to pull in the strands of yarn. Then I thought, oh my, you learned how to crochet so long ago, why not pick up on it now? And guess what? I prefer crochet to knitting!