not miss a trick
Also, never miss a trick; not miss much. Not fail to be aware of what is going on. For example, When it comes to the commodities market, Mark never misses a trick, or Dad may seem absentminded, but he doesn't miss much. The first phrase dates from the early 1900s; the variant employs miss in the sense of "fail to perceive," a usage dating from the late 1600s.