As always, I am adding these as I come across them so feel free to submit your own helpful links.

3 Ways to Use 2 Part Epoxy Resin
Jewely Making Tips from About.com
Easy Flower Earrings Tutorial
Beadopia - lots of good instructions on wire and knots
How-to-Make-Jewelry.com - more knot instructions and tutorials
The Jewelry Sweet Spot
Basic Wire Skills
Beadage - free beading patterns and instructions
Top Ten Free Bead Patterns
Designer Tip Sheets - links to PDF project sheets
More Project Sheets from the above site
Free Chainmail Weaving Tutorials - really cool
Wire Guages and Bead Sizes and Thread Sizes
Birthstones
Wire Techniques
Knotted Chainmail Tutorial