Hold the two pieces you want to bind together with right sides facing each other. You want them to be aligned on top of each other in your left hand (assuming you normally hold your knitting in your left hand). Put the point of another needle into the first stitch of each needle knit-wise and knit them together. Continue on to the next two stitches, binding off as you go. After a few stitches, turn it over and see how it looks. You may need to adjust your tension to get it to look right.