Shit my bad, I misunderstood your question because a side-effect of doing Zoltars is severe brain damage. But what
@Squatty said, you have to memorize the categories of different types of business. If you know how to mark one dealership, you know how to mark them all. If you see a weird Chinese name, it's quite likely they're making goods and shipping them to you, etc.
Don't stress about missing a few, better than you do them slowly and get the hang of it than you churning them out fast and then getting a block for not being accurate enough.