The problem is guessing which ones you should let pass by. I let Butler, Newman and Pohle go by, which turned out to be a very smart decision when the Library Builder came. But how do I repeat that accomplishment?
Do you know you can go to Notifications on your account and check the boxes for CP's, prepubs, and Catholic resources (and whatever else interests you)? That way you'll get emails about things. Or you can use the RSS feeds for CPs and prepubs. The normal Twitter feed is useful as well, since that's where the Daily Deal at 50% off turns up. Not that it's been anything even remotely interesting for a long time now, but sooner or later something's got to turn up.