I'm in a group called Sock Knitter Anonymous where it's OK to be a sock addict and stash sock yarn! They have a challenge set every month, and you have the choice of two techniques or two featured designers to pick from. You can never make plain socks or simple ribbed socks, they don't count. It's called Sockdown! So for January, you have to do a post for your Cast On, you can do a progress post if you want and then you do a Bind Off post showing your finished socks. To participate for January you have to post a Cast On post before midnight on Jan 31st, but you actually have two months to complete your project, and your BO post has to be made before midnight on Feb 28th.
There are prizes too for random participants who completed all the criteria, and as they're random you don't have to worry about not being the fastest knitter or not making the most complicated pattern.
I want to make more socks this year, I only made 4 pairs in 2013, which for a self confessed sock addict is appalling! I thought the challenge would help me on my way and teach me some new things too.