There are two kinds of preppers. The kind that read and study and are endless resources of information and then there are those who do. The doers are learning by trial and error through actual experience. While neither way is technically the right way, it is pretty safe to say the doers are probably going to fare better in a true post SHTF situation.
Knowledge is power, but reading about starting a fire with a spark from a magnesium stick and actually knowing exactly how to hold the stick and how close to the tinder bundle it needs to be are two different things. Armchair preppers need to get out from behind the computer and get out into the wild from time to time. These knowledgeable armchair preppers do have their place in a post-apocalypse world. They will be a fountain of information and they can certainly direct others on what they should do, but if this kind of prepper is all alone, talking to the air isn’t going to help.
There are a ton of skills that go along with survival; prepping, homesteading, growing food, raising animals and so on. Reading how to make cheese and actually making cheese are very different. Reading about butchering livestock and getting your hands bloody doing it will definitely be a shock to the system. Survival is messy business and if you aren’t used to or expecting the ick, you are going to have a tough time coping.
Get up, get out and get doing. Put your knowledge to the test and use the information you have gathered through research to really test your skills. Don’t wait until you actually need the skills to give them a trial run.