Not really, there are only 46 47. But I plan to update this list when I find tutorials for new techniques, or better examples of things already on this list. If you know of a great one, I’d love to hear about it.
Buttonholes
Collars
Construction
Cutting
Darts
Finishing – knits
Finishing – wovens
- Hemming a curved edge by machine
- Blind hemming
- Making continuous bias tape
- Making piping (same page)
- Making bias tape with a pin (or two pins)
- Bias binding for necklines & armholes, 3 ways
- Machine finished bias binding
- Bias tape – mitred corners
Fitting
Lining
- Lining a sleeveless bodice with a back opening
- Lining a sleeveless bodice without a back opening (burrito method)
- Quick lining (combined lining & facing)
- Bagging a jacket
- Lining a vent
Necklines
- Taping a neckline to stop it gaping
- Finishing a neckline or armhole with piping – and a nice finish inside
Pockets
Seams
- A guide to seam finishes
- Hand sewing without knotting the thread
- Sewing with sheer fabric (seams, hems, binding)
- Sharp corners on inset pieces (an angled piece inserted flat)
Skirts
Sleeves
Straps
Waistbands
Zippers
… and many more here …
- Fashion Sewing Blog TV videos (one listed above, lining a vent)
- Threads Magazine videos (one listed above, corners on inset pieces)
sixty six stitches 
if you separated out the seam finishes you would have closer to your 66. I love the coletterie blind hem tutorial http://www.coletterie.com/tutorials-tips-tricks/tutorial-how-to-sew-a-blind-hem and the JuxtaposeNZ bound button holes http://juxtaposenz.blogspot.co.nz/2013/04/how-to-make-spanish-snap-buttonholes.html – which are bit different from normal ones
Those buttonholes are fantastic! I’ve never seen anything like them. Added, thanks! I’ll have to have a closer look at the blind hem tutorial, too. The trouble with blind hemming is that it seems so tricky at first but once you get it, it’s completely intuitive and you can never imagine how it was difficult. Like that picture that’s the old woman and the young one at the same time.
What a great reference list – will definitely have to come back here when I’m looking for something. I recently found this tutorial for inset corners – it is fabulous http://www.threadsmagazine.com/item/4517/video-conquering-inset-corners
Aaaand now I’m going to spend half the day looking at Threads videos! Thanks for that one, it’s added!