There is a "game" going around on Facebook where you pick the book nearest to you and type in the 5th full sentence on page 56.
I learned something when I did it. The book I grabbed was Echo King's Finding Answers in British Isles Census Records. King mentioned that in the 1841 UK Census enumerators were not requried to give full Christian names. I probably knew this at one point in time, but the remembering did not hurt me.
While I'm not going to spend all day picking out pages at random to read, the exercise did remind me that every so often it is a good idea to pull out one of those references we have not read in a while and review a chapter or two.
We may learn something. I know I did.