The simplest way is to go for universal knitting needles with sharp (pointed) tips. Sharp/pointed needle tips suit most projects and can be used easily with almost every type of yarn. However, the choice solely depends on your preference and the types of projects you regularly have. If you get projects to sew cotton and yarns that split, then you can opt for a wooden needle with a round tip as that will be more productive. Make sure to check the material of the knitting needles and tip styles to see if this particular set works fine for the item you wish to create. After some research and attempts, you will be able to determine the best knitting needles for your project in no time.