The Internet is a great resource for online tutorials. Here are a few to get you started:
Knitting DailyKnitting Daily is a community for knitters who want inspiration, innovation, motivation, knitting content and patterns for all levels and interests.
This site is actually an online retail store where you can purchase yarn, tools, printed materials, as well as learn techniques with their tutorials.
Craftsy
Online classes for knitting, crocheting, photography and more.
The industry trade association. Offers instruction, patterns, and links to consumer knitting and crocheting guilds.
Magazines
These magazines are fun and informative and all are available in digital format:
Knitty is the longest-running free knitting magazine on the web.
An independent on-line magazine focusing on knitting and the sister arts.
Interweave Knits inspires and informs the modern knitter with projects and articles that celebrate the handmade life.
Each issue features more than forty fashion-forward projects by both the premier Seventh Avenue designers and the leading talents in the international fiber arts design industry.
Creative Knitting Magazine contains stylish knitting patterns to inspire your creativity and fan the flames of your love for knitting.
Retailers
There are many online resources to purchase yarn and supplies and (often) free patterns. Here are a few of my favorites:
Free patterns and tutorials featuring Lion Brand Yarns. Sign up for their newsletter.
Sasha makes and hand-dyes yarn from local purebred sheep. Sign up for newsletters to learn about the different sheep breeds!
Annie's
Online craft classes, 25+ yarn brands, the latest patterns and newsletter.
Shop creative eBooks, online patterns and DVDs.
Another retailer with free patterns and an "Inspiration Machine."
Great resource of yarns and patterns, featuring Berroco yarns. Their weekly newsletter features great tips and free patterns.
A favorite of Ravelry members, The Loopy Ewe also has a frequent buyer club that many enjoy.
Knit Picks also has great tutorials besides selling some very popular interchangeable circular knitting needles and good quality yarns.