"It's easy to crochet a rough approximation of a sphere, but for mathematically inclined people this is the only method that gives real satisfaction." Generates a pattern for up to 1000 stitches in circumference.
Crochet - Tutorial: "Crocheted jogless stripes" A common problem in amigurumi: you want to crochet something striped, but there's this funky looking stairstep "seam" running diagonally where you change colors.
interesting technique - How to crochet HDC to create this stitch which looks like knit stockinette. Crochet stockinette is worked from side to side, instead of up & down - There is no limit to crochet! (with photo tutorial)
Ravelry: Fast and Easy Cowl pattern by Margaret Zellner. This large loopy moebius cowl in worsted weight is fast and easy to make. 200 grams worsted wt yarn, and size needles. Uses Cat Bordi's Moebius Cast On.