If your stash of leftover sock yarn is threatening to eclipse your actual stash - have you considered welcoming a mitered square blanket into your life.
Colourful, fun and pleasingly thrifty - I have both a sockweight and a DK version on the needles most of the time and they are wonderfully therapeutic.
And they are very straightforward too - I have a free tutorial on my blog which explains how to get started. Along with an ebook if you want to go deeper.