Yarn bowls are lovely and keep your yarn from getting tangled/roaming across the land, but they can be wicked expensive.
Star Hook Case - free crochet pattern
Helix Knitting-this knitting technique demonstrates how to knit with various colours in the round on circular needles without creating a jog.Excellent for knitting socks.
Use a shoe organizer to store yarn.
If you are working on a small project, store thin yarn in a tea infuser for safekeeping while traveling.
"Ring Row Counter"...I was just thinking yesterday that the needle counter doesn't work for crochet. So I definitely need one of these!
Organizing knitting needles
31 Days to Get Organized – Storage ideas for your knitting & crochet works in progress
How to Loom Knit a Hooded Cowl (DIY Tutorial) - YouTube