I use "Big Book of Knitting Stitch Patterns " and Ingrid recently recomended a new Vogue stitch pattern book.
(someone please help my neverending links, I seem to always mess them up when I try .... then eat this message so everyone will think I did it myself)
I have a "neverending" swatch of new stitches I am learning ... glitches and all. I just changed to white yarn for January ... as close as we get to snow here in Florida. I always use # 6 needles and WOTA (KnitPicks Wool of the Andes) that way when I am trying to get gauge for a new project I have a "starting point".... and I don't have to remember what needles or weight of yarn I used for the stitch pattern swatch.
I like learning new stitches and they can be used for any project ... wash cloths, hats, scarves, pillows, placemats , bags ...