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Honestly, use either 568A or 568B, it doesn't matter, as long as it is the same on both ends. Otherwise you get a crossover connection. Most switches are Auto-MDX but it is best to simply wire it as a patch through instead for the best compatibility. From my experience, 568B seems to be more prevalent than 568A, both in new and older wiring construction. I personally wire all new cables to 568B, unless the existing plant is 568A. Don't mix the two as that can confuse people.
Also make sure you use a metal punchdown tool and not one of those crappy plastic "punchdown tools" that often times comes free with the CAT5/CAT6 keystone. Much more solid punchdown and trims your cable tail for you in one operation.
GJ wiring for a rookie. Keeping the cable twists as close to the termination is best as well as the outside jacket.