There are many techniques for binding off stitches. For some projects (like toe-up socks), it is imperative that the bind-off is very stretchy. Getting a stretchy bind-off is easy for some, but much more difficult for others (like me). By far, the most-stretchy bind-off I have found (other than a decorative picot type bind-off) is Jeny’s Surprisingly Stretchy Bind-Off (JSSBO). This is now my go-to for most of my socks. The basic idea is that you do a yarn-over (yo) before each bind-off stitch; a reverse yo before a knit stitch and a regular yo before a purl stitch.
A reverse yo is done by passing the yarn over the top of the needle from back to front. A regular yo is done from front to back over the top.
Here are the steps for the 2×2 rib cuff recommended for Fit ‘nilla:
Setup: Do a reverse yo, knit one stitch, pass the yo over the knit stitch. One stitch remains on working needle.
Step 1 (knit stitch):
Do a reverse yo, knit the next stitch (now you have 3 stitches on working needle), and then pass both the yo and the first stitch over the stitch just knit. You can do these pass-overs one at a time or both at once; whichever way works best for you.
This leaves one stitch on the working needle.
For a 2×2 rib, the next stitch is a knit stitch, so you will repeat this step once more.
Step 2 (purl stitch): Do a regular yo, purl the next stitch, and then pass both the yo and the first stitch over the stitch just purled.
You are back to one stitch on the working needle.
Repeat this step for next (purl) stitch.
Continue in this manner, doing Step 1 for all knit stitches and Step 2 for all purl stitches.
When all stitches have been bound off and one stitch remains on the working needle, snip yarn and pull stitch (making it bigger and bigger) until end comes through and is free.
Please do as shown above. Do NOT stick the end into the loop and pull. This will create a knot. Just say NO to knots!
Finally, use tapestry needle to join to first bound-off stitch and weave in end.