Here's how to mend holes in knits.
How to Calculate Yardage For Drapes & Curtains
Embroidery Floss wound on clothes pins - handy *and* beautiful. Love it.
Marking areas for stitching with painter's tape
How to get the perfect edge when sewing. I never EVER would have figured this out by myself!
An excellent tutorial on the blanket stitch.
Elastic waist skirt tutorial - with details how to make the skirt in any size
How to Crochet a Box - great way to use up yarn and get storage boxes: stiffen with wallpaper paste or liquid starch. Also, I'd like to make this the same size as a cardboard box (cover the cardboard box with saran wrap and it can be used to help form the crochet box once it's soaked in the stiffener).
Free patterns- How to Crochet a Box. And other things like this.