I got my razors from the club, DSC, should ring a bell. Very light on the wallet, as well as just as good if not better to their equivalent in stores which mark up prices like crazy. I'm not trying to advocate or anything but from my experience as per shaving.
I always had preferred a day used razor better than a brand new one since I always have to get accustomed to the new blade which means slice here, nic there, or a burn elsewhere.
My face usually needs a twice over every time I shave. First time with shave butter, making sure I lightly just essentially brush my razor over the areas of shaving. Then the initial rinse, then lotion my face, and then start process to lightly go over each area in which I go against the grain which gets the smooth for my face, then I wash my face completely thereafter, and then lotion up once more.
For my arms, I generally just go over them in the shower, exfoliate before and after shaving, but during the shave I generally use a light touch and move slowly. Legs the same except after exfoliating I would lather up my soap and then shave in the same process as my arms.
When I was younger and well not my true self, I would beat myself up every time I shaved even my face. I would let my razors get months old before replacing, dry shaved, used extreme force when pressing the razor to my face, always against the grain, not even using any sort of after shave or after shave lotions.surprisingly I never had razor bumps, just a bunch of little nics here and there.
I hope this explains a little of what to do and what not to do.... also never ever ever ever attempt to dry shave the top of the head, that is never a pretty sight nor fun. I speak from experience on this matter.
Kate <3