One of the faster ways to learn vectoring is to learn only the pen tool (fill/stroke/select/angle/bend etc.) Something
else that is really important... learn the shortcut keys to hold while using pen tool. Normally I select Pen tool, and
click starting point, then click and hold next point, bend how i want it, then (if i want it to not bend and make a
straight line) hold ALT and click the last point made, it will reset its angle to none. (If you hold alt and touch a
point in between 2 others like: []------------[o]-------------[] it will allow u to edit its bending and if u pay close
attention to the anchor point it shows u the range of the bend on both sides of it, while continuing to hold ALT, u can
basically select each bend point individually and adjust one of the two sides. Like everything else it takes practice.
One thing is true tho, Photoshop isnt vector based the whole time, once u stroke/fill it, its pixels, so if u want to
keep the vectors, make it all, then go to paths window and rename the default path to something like "Original
Image Vector" and from then on, u can just copy that over to a new document, resize and adjust as u like and it
will come out 100% perfect each time, (no stretch marks :P) If you need images to see what i mean in any step, please
feel free to ask for em :)