Cable needles
If you plan on working with cables, you will probably want to buy some cable needles. Here is my advice: do not buy the KnitPro wood cable needles with ridges. They are an absolute nightmare to use. I bought them and I ended up using an extra standard needle as a cable needle because that was easier and faster than the KnitPro ones. if you can find them, do buy the ones which are U-shaped, like the ones you see Edie Eckman using in the video lessons I recommend in my previous post. Those are much easier to use, but for some mysterious reason harder to find. Cable needles do not have to be the same size as the needles you're using. So you don't have to buy all sizes at all. Don't worry about it. However, they must absolutely not be larger (or better said thicker) than the ones you're using. Thus the best thing is to buy some relatively thin ones that will work for almost all projects.