A pink picture

I’m almost at the heel of my second sock. The yarn feels so good to work with and the color is so lovely. And toe-up works fine. The pattern is designed for this yarn and it has assured me that one skein will be enough but I wonder. That ball is not very big and there is a lot of sock left. I think it might work but it will be close.

With this project so close to the finish line I have started glancing at other projects. What should I cast on next?