>>1816815Something like this. You need to make sure you keep the tips of all the hair consistent between each other. Many of your tips begin very fat, get thin in the middle, and then fat at the ends. You want the tips to start thin, and then the middle and endpoints get larger gradually. It is a good idea to pick thicknesses for areas of the image, such as hair, skin, clothes etc. and make sure the thicknesses within each area stay consistent with each other. Always be reference back to other lines in that area and making sure it matches, or is at least close to that thickness. You also need to use less nodes. The more nodes you place, the harder it is to control thickness, as well as making it difficult to smooth a line, especially in hair.
I'll go ahead and post the file to make it easier to see node placement:
https://mega.co.nz/#!ZhIyiZhR!Wqhjbi25p2C_4o-zEY6NO3ShTFq4Fj9GcTmnUvAnOJIIt is pretty much inevitable that your first few vectors won't be very good. As much as I explain or show through an image, it really doesn't click until you've done it over and over again.