Answer:
Ben Franklin says, "Don't think to hunt two hares with one dog" (Holdren 33). It means that one should focus on one thing at a time, and one should not try to complete two tasks together. Because I also follow this rule, it's my favorite adage.
Step-by-step explanation:
According to the pdf version of the book online, the "Early to bed" quote is on page 20, so I took a quote from that page. Also, Holdren is not the author -- not sure why they have it like that --, but I will just follow suit.
(Honestly, doing this kind of assignment is quite tasteless. It limits the writing process).