I’m back from a jam-packed weekend at TNNA, and as usual, I feel tired and happy and bursting with new things to think about and work on. (TNNA is The National Needlearts Association, a trade group consisting of the yarn industries: both knitting/crochet and other needlecrafts like cross-stitch and needlepoint. Their big annual show is in late spring/early summer, showcasing…