Both socks and sweaters span a range of skill levels from "suitable for a competent beginner" to "seriously mad skills, yo!" and while I while I have some skills my repertoire of sock construction techniques is somewhat limited* and I have zero** sweater experience.
For Christmas, my DH gave me Ysolda Teague's Little Red in the City, a book about sweater modification (with seven patterns) and just today I picked up the digital copy of Ann Budd's Sock Knitting Master Class which covers a variety of sock construction techniques, both cuff-down and toe-up and a variety of cast-on, bind-off, heel, and toe methods. Add to this my Best of Knitter's Magazine's Guy Knits, and the form of my resolution becomes clear: Knit a sweater each for myself and my husband, and work my way through Sock Knitting Master Class.
My current method of knitting is to alternate between knitting for myself and my husband, so my master class goal is not so much to knit all 18 socks as, 365 days from now, being able to say "look at the new techniques I have tried". And two finished sweaters.
* one pair cuff-down socks, rounded heel, wedge toe, kitchener BO; several pairs toe-up, short row and Turkish CO, rounded heel, Judy's Surprisingly Stretchy BO
** I have knit three baby sweaters using different techniques but they're on a completely different scale and "shaping" isn't particularly important.