This is a great example of why I'm not that big a believer in flash cards for studying for the GMAT, which is more a test of how you think than of what you know. Memorizing rules, formulas, and tricks outside the context of actual GMAT questions is a pretty low return on investment to me. If you're going to use flashcards, I'd highly recommend that you make them yourself, and that you make them for things that you know that you need to emphasize.
For sentence correction, specifically, I think you're much better off looking for particular decision points and working from them. The GMAT routinely tests:
Verb Tense (logical timeline)
Training yourself to get really good at the above will answer just about every SC problem that you may find, and for the few problems on which you can't apply the above you'll have worked through enough problems to have more of a feel for it. Memorizing grammatical terminology is a long, cumbersome road that really doesn't need to be taken.
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