I've just finished this beaded wristband, started yesterday evening. We had a workshop on knitting with beads, at the Huddersfield branch meeting of the Knitting & Crochet Guild. The workshop was taught by Marie, who had designed the lacy wristband as a quick knit for us to learn on. She showed us two well-known techniques (well-known even to me, and I had never tried beading before) - first, threading the beads onto the yarn before you start knitting, and second, using a very fine crochet hook to attach each bead. But the technique we actually used was a new one, which uses dental floss - of a particular type (Oral-B Super Floss, to be exact). The floss comes in handy lengths and, crucially for beading purposes, each length has a stiffened section at one end that you can thread through a bead. It's a really clever way of adding a bead to a stitch, and looks much easier to do than the other two techniques. There are tutorials on YouTube explaining how to do it: you can search for "super floss beading".
It was a very well prepared workshop - Marie supplied suitable yarn (wound into neat little centre-pull balls), dental floss and beads, as well as the pattern she had designed. And she had threaded enough beads for the wristband onto a length of dental floss for each of us. (On the other hand, I wasn't well prepared at all - the one thing we had to supply for ourselves was knitting needles, and I had forgotten. Luckily a friend had a spare circular needle with her of the right size, and lent it to me.
Here's my wristband in progress:
And here's the dental floss with beads threaded onto it: