Needle, mainly two needles. one is long and thin for the samll and medium exquisite cross stitch, The other one is the short and wide, for the cotonine. The size of needle hole, the shape of needle, the longth, must be take into conserideration.
water-solubility pen to draw on thr cross stitch, you can draw the pattern on the cloth, then embroider.
seam ripper, As you may make a little mistake, the seam ripper can help you deal with the mistake, embroider again.