I don't recall specifically, but it's pretty easy to find articles e.g. on Runners World. Practically everyone seems to recommend Born to Run but personally I've never read it. For me it was getting my body lean and foot landing more forward, pushing more than pulling, and sacrificing a bit of stride length for higher cadence. And not being afraid to take breaks, especially when I was first building up to 5K. Any halfway decent running store should be able to help you understand about foot landings and get you the right shoes for your style. In fact, one of the things that has really helped me stick with it is being able to geek out about training and gear and stats. Plenty of room for that, and without it I might have had more trouble especially in the winter months. Good luck!